UBALDI, Patrizia

1989-92. Commentary on CISG Article 36 [- in Italian], in: Bianca ed., Commentario coordinato, Padua: CEDAM (1989-92) 152-161


2005. Application of the CISG in the United States 7 EJLR (2005) 277-301


2013. Equitable estoppel and CISG [ - in Turkish], Hacettepe Hukuk Fakültesi Dergis (Ankara) vol. 3, no. 2 (2013) 161-178

UGRIN, T. S. [Russia]

2000. [About the Idea of International (Foreign) Sale of Goods – in Russian] 9 Law and Order (2000) 49-51


1987. International Encyclopedia of Comparative Law, Vol. XIV: Copyright and Industrial Property, chap. 1: General Questions - The International Conventions, Tübingen: Mohr (1987)


1975. Die Immaterialgüterrechte im internationalen Privatrecht [Industrial Property Law in Private International Law - in German], Köln: Heymanns (1975)


1977. Gewerbliche Schutzrechte und Urheberrechte im internationalen Privatrecht [Commercial Industrial Property Rights and Copyright Law in Private International Law - in German], 41 Rabels Zeitschrift für ausländisches und internationales Privatrecht (1977) 479-512

ULMER, Nicholas C.

1998. Soinco v. NKAP: A "War Story" [Commentary on Zurich Arbitration proceeding of 31 May 1996], 13-3 Mealey's International Arbitration Report 15 (1998)

ULMER, Peter

2003. Recht der allgemeinen geschäftsbedingungen und allgemeines zivilrecht [Law of the General Conditions of Sale and General Civil Law - in German], in: Santiago Espiau Espiau / Antoni Vaquer Aloy ed., Bases de un Derecho Contractual Europeo [Bases of a European Contract Law], Tirant lo blanch: Valencia (2003) 120-129

ULMER, Peter / BRANDNER, Hans Erich / HENSEN, Horst-Dietherl / SCHMIDT, H.

1989/2006. AGB-Gesetz [Commentary - in German], Köln: Otto Schmidt, 6th ed., 1989 [references to CISG by Schmidt Anh. § 2 nn. 15-16a, pp. 192-194]; 7th ed., 1993 [references to CISG by Schmidt Anh. § 2 nn. 14-16a, pp. 200-203 and Hensen § 11 No. 7, n. 39, pp. 614-615]; 10th ed. (2006)

ULUSU, Ayse Elif

2011. Milletlerarasi Mal Satimina Ïliskin BM Antlasmasinda ve Avrupa Borçlar Hukuku Prensiplerinde Tazminat Sorumlulugunun Sinirlandirilmasinda Öngörülebilirlik Ïlkesi [Principle of Foreseeability under CISG and Unidroit Principles - in Turkish], Beta Yayinlari, Ïstanbul (2011)


2003. Los Principios de UNIDROIT: Nuevo instrumento del derecho del comercio Internacional [ - in Spanish], Doctoral thesis, Universidad San Pablo-Ceu (2003) [Spanish abstract available at <http://www.mcu.es/cgi-bin/TESEO/BRSCGI?CMD=VERDOC&BASE=TSEO&DOCN=000102205>



1981. UNCITRAL Secretariat. Commentary on the 1978 Draft Convention on Contracts for the International Sale of Goods, UN Doc. A/Conf. 97/5 (14 March 1979), in: United National Conference on Contracts for the International Sale of Goods, Official Records, UN Doc. A/Conf. 97/19, New York (United Nations) 1981, 14-66; in: Honnold, Documentary History, Kluwer (1989) 404-456 [See also: the Database directory and the section entitled, "CISG: English text article by article". A link to the page provided for each article will enable researchers to access the full text of all elements of the Secretariat Commentary that appear relevant to that article; another Internet publication of the Secretariat Commentary may be accessed at the commentary page of the CISG online website: http://www.jura.uni-freiburg.de/ipr1/cisg

The CISG online Editor's note: Secretariat Commentary is recommended reading. It includes sections entitled: Function of the Secretariat Commentary [on the 1978 Draft]; The 1978 Draft and its relation to the CISG; The Secretariat Commentary by CISG online; Available [Secretariat Commentary] Search machines and how to use them.


1989. UNCITRAL Secretariat. Explanatory Note by the UNCITRAL Secretariat on the United Nations Conventions on Contracts for the International Sale of Goods, Vienna, United Nations, Document V.89-53886 (June 1989) 23-29


1990. UNCITRAL Secretariat. Note on the Convention on Contracts for the International Sale of Goods, in: Asian-African Legal Consultative Committee, Regional Seminar on International Trade Law, New Delhi (1990) 64-70


1992. UNCITRAL Secretariat. UNCITRAL Congress. Uniform Commercial Law in the Twenty-First Century: Proceedings of the Congress of the United Nations Commission on International Trade Law, 18-22 May 1992, New York: United Nations. A/CN.9/SER.D/1, Sales No. 94.V.14 (1995) 276 p. [For reviews of this publication of these proceedings, see V. Nagarajan, Uniform Commercial Law in the 21st Century, Law Asia (1996-97) 71-72; Camera di Commercio internazionale, Sezione Italiana (28 March 1997); Associazione italiana per l'arbitrato (7 May 1997)]

Object of proceedings

"The UNCITRAL Congress was designed to enable the participants to consider the accomplishments achieved in the progressive unification of international trade law during the past 25 years and . . . the needs that could be foreseen . . . [to provide] up-to-date information and practical guidance concerning principal legal texts of universal relevance; an opportunity to express opinions on the practical value of current laws and rules governing world commerce; a forum to voice . . . practical needs as a basis for possible future work by UNCITRAL and other agencies involved in formulating texts for international commerce" (Gerold Herrmann, Secretary of UNCITRAL) iii

Selected identification of presentations bearing on the CISG and the unification of commercial law


Birth and goals of UNCITRAL

Background to the establishment of UNCITRAL: László Réczei 5-7

Birth of UNCITRAL: Aron Broches 7-9; André Erdös 9-10

Goals of unification: John O. Honnold 11-13 [Subjects discussed: clarity or, in other words, predictability; flexibility and adaptability to different situations; modernization; fairness]

Process of preparing universally acceptable uniform rules: Willem C. Vis 14-16

Methods of improving coordination between formulating agencies

Overview: Eric E. Bergsten 16-20

Role of the International Institute for the Unification of Private Law (UNIDROIT): Malcolm Evans 20-23

Role of The Hague Conference on Private International Law: Michel Pelichet 23-26

Role of the International Chamber of Commerce (ICC): Dominique Hascher 26-28

Techniques of unification

Legislative means of unification: Sergei N. Lebedev 30-33

Non-legislative means of harmonization: Michael Joachim Bonell 33-40 ["Judicial" unification: the role of the Court of Justice of the European Communities in the development of European Community Law; the role of national courts and arbitrators in the interpretation of international conventions; the UNCITRAL initiative for the collection and dissemination of international case law. Unification by legal doctrine: the role of legal doctrine in the unification process in general (from the preparatory studies for international conventions to the commentaries on them); the idea of an international restatement of contract law (the UNIDROIT draft Principles for International Commercial Contracts). Unification by contract practice.]

Principles of interpretation of a uniform law and functions of travaux préparatoires, commentaries and case collections for interpretation of a uniform law: Zhang Yuqing 41-47 [Different approaches to interpretation of domestic law: subjective principle (civil law and U.S. practice); objective principle (practice in the United Kingdom). Rules of interpretation for a uniform law: rules established by the Vienna Convention on the Law of Treaties; rules established by the United Nations Convention on Contracts for the International Sale of Goods. International Character. Uniformity. Principle of good faith. General principles. Aids in interpretation of uniform texts: travaux préparatoires and commentaries; decisions of foreign courts and arbitration tribunals. Considerations on the promotion of uniform interpretation and application: wide dissemination of the text of the uniform law and its travaux préparatoires and commentaries; collection and compilation of cases; seminars and expert review panels.]

Proposals for an international tribunal to interpret uniform legal texts: Louis B. Sohn 50-54


The CISG: an overview

United Nations Convention on Contracts for the International Sale of Goods; an overview and consideration of some practical issues relating to it: S. Kofi Date-Bah 69-77 [History of the Convention. Highlights of the Convention: structure of the Convention; sphere of application; non-mandatory nature of the Convention. Practical aspects of the rules on formation: revocability of offers; acceptance in prescribed limited circumstances need not be a mirror image of an offer. Practical aspects of the obligations of buyers and sellers.]

Remarks and recommendations

Remarks on behalf of the Union internationale des avocats: Burghard Piltz 85-87 [Comments on the need to share information on interpretations, e.g., Battle-of-the-forms issues, Article 79 force-majeure type issues, "fundamental breach" of contract, the phrase "reasonable time" or "short time". Recommendation: "through international cooperation coordinated by UNCITRAL . . . official comments and recommendations for the application of the Sales Convention; a model could be the Official Comments to the United States Uniform Commercial Code"]

Remarks on behalf of the Section of International Law and Practice of the American Bar Association:
Helen E. Hartnell 91-94 [Comments on the need for clear uniform private international law rules for substantive or formal validity; validity of exemption clauses, etc.]

Remarks on behalf of The Association of the Bar of the City of New York: Michael L. Sher 94-103 [Recommendation: an International Commercial Arbitration Moot on the CISG]

Remarks on behalf of the International Bar Association: Hans van Houtte 83-85 [". . . to make lawyers more familiar with the Sale Convention . . . universities should include the Sales Convention in their regular curriculum . . . the Sales Convention should be the subject matter of publications [and not just specialized publications] . . . general law reviews with a large audience should also discuss the Sales Convention and publish surveys of domestic court decisions relating to the Convention . . . [to make companies] aware that the Sales Convention strikes a fair balance between the rights and the duties of the seller as well as of the buyer . . . the follow-up should also focus on the companies, the customers for which the Convention is intended."]

Remarks by Philippe Kahn (University of Burgundy, Dijon, France) 103-104 ["the phenomenon of the consolidation of the Convention [by national States] is not followed through vigorously enough. . . . The Convention . . . is suffering from the fact that it has not yet been well introduced through professional organizations. . . . [S]cholars have commented on it, and once the comments have been made, . . . students and . . . professors . . . have read them, but there is a whole professional group that is not [sufficiently] informed of this in . . . language that would enable it to be familiar with the advantages and drawbacks of this type of convention. . . . [T]he Convention . . . represent[s] a perfectly appropriate solution for international trade relations, [but] it is necessary to make a major effort and devote a great deal of energy to the task of transferring this entire system to the professional circles . . . particularly the bar organizations and lawyers' associations. There could be [the] . . . apparatus that the ICC employs quite well in certain areas, proposing various alternatives in relation to the Convention by drafting model solutions, if not model clauses."]


Ideas for future consideration

Secretary of UNCITRAL (Gerald Herrmann) 252-259 ["Analysis of court interpretations of UNCITRAL texts, with possible recommendations for uniform interpretation. . . . [Having] on-line the status of conventions, the bibliography and similar information. . . . [Having an] international documentation centre for commercial law . . . [Organizing] or co-sponsor[ing] summer courses on uniform commercial law, perhaps similar to the ones at The Hague on private international law and public international law. . . . practice-oriented [courses] and possibly for only two weeks . . . [One could envisage] having in the future something which is already in place for maritime law, namely a World Commercial Law Institute . . ."]


1995. UNCITRAL Secretariat. The United Nations Commission on International Trade Law commissioned Professor John O. Honnold (working in conjunction with Professor Michael Joachim Bonell and Ambassador Mahmoud Soliman) to devise a classification of each of the provisions of the CISG. This classification or outline of the CISG (referred to by UNCITRAL as a thesaurus) was designed for recording, classifying, and retrieving decisions under the CISG. As a detailed breakdown of the subjects addressed in each provision of the CISG, it has broader utility: to professors and students as a learning aid, and to practitioners and jurists as a guide to the contents of each article of the CISG.


2001. UNCITRAL Secretariat. Legal aspects of electronic commerce. Possible future work in the field of electronic contracting: an analysis of the United Nations Convention on Contracts for the International Sale of Goods. Note by the Secretariat (9 February 2001) prepared for Working Group on Electronic Commerce, Thirty-eighth session, New York, 12-23 March 2001, A/CN.9/WG.IV/WP.91, 1-15


1968-1980. UNCITRAL Yearbooks relevant to the CISG. Vol. I (1968-70) New York (UN) 1971, 159-232, 299-300; Vol. II (1971) New York (UN) 1972, 37-113, 143-148; Vol. III (1972) New York (UN) 1973, 31-95, 311; Vol. III (1972) New York (UN) 1973, 1-297 (Suppl.); Vol. IV (1973) New York (UN) 1974, 31-100, 229; Vol. V (1974) New York (UN) 1975, 29-95, 216-224; 242-243; Vol. VI (1975) New York (UN) 1976, 49-119, 298; Vol. VII (1976) New York (UN) 1977, 87-142, 321; Vol. VIII (1977) New York (UN) 1978, 73-169, 311; Vol. IX (1978) New York (UN) 1981, 61-146, 219; Vol. X (1979) New York (UN) 1981, 174; Vol. XI (1980) New York (UN) 1982, 37, 149-164, 168. See also: Honnold, Documentary History, Kluwer (1989) for photocopies of virtually all CISG contents of Yearbooks I-XI.


2010. United Nations Convention on Contracts for the International Sale of Goods, UNCITRAL (2010) <http://www.uncitral.org/pdf/english/texts/sales/cisg/V1056997-CISG-e-book.pdf>


1999. Legal aspects of international trade, prepared by the UNCTAD Secretariat, New York/Geneva: United Nations (1999) 61 p. [report prepared by C. Moreno, with inputs from M. Faghfouri] [Contents: International Sale of Goods, paragraphs 7-36 (summary of CISG); Incoterms, paras. 37-83 (summary of Incoterms); Payment methods in international trade, paras. 84-229; Bank guarantees as a protections against non-performance of the contractual obligation by the seller, paras. 230-249; Annexes on related subjects, pp. 43-61]


1988. International Uniform Law in Practice/Le droit uniforme international dans la pratique [Acts and Proceedings of the 3rd Congress on Private Law held by the International Institute for the Unification of Private Law (Rome 7-10 September 1987)], Oceana: New York (1988) 575 p. [presentations by Boggiano, Bonell, Brazil, Carver, Enderlein, Evans, Farnsworth, Ferreri, Hager, Honnold, Kahn, Loewe, Mbaye, Schwarze, Wang, and others; observations by Ameli, Bergsten, Carlini, Del Duca, Drobnig, Gorla, Gruber, Herber, Klingsporn, Magnus, Reinhart, Sevón, Thieffry, and others]


1998. Los principios de UNIDROIT: ¿Un derecho Común de los Contratos para las Américas?/ The UNIDROIT Principles: A Common Law of Contracts for the Americas? (Actas/Acts - Congreso Interamerican/Inter-American Congress - Hacia un nuevo regimen para la contratación mercantil internacional: los Principios de UNIDROIT sobre los contratos comerciales internacionales/ A new approach to international commercial relations: the UNIDROIT Principles of International Commercial Contracts, Valencia, Venezuela (6-9 November 1996) [presentations by Abascal, Adrián Hernandez, Beraudo, Borjas Hernandez, Boggiano, Ferrari Bravo, Hinestrosa, Illescas Ortiz, Morán Bovio, Opertti Badán, Para-Aranguren, Perales Viscasillas (- in Spanish); Baptista, Bonell, Farnsworth, Holtzmann, Juenger, Kozolchyk, Tramhel, Ziegel (- in English)], Rome: UNIDROIT (1998)


2013. Model Clauses for the Use of the Unidroit Principles of International Commercial Contracts, International Institute for the Unification of Private Law (Rome) Unidroit (2013) 22 p.


1994. Principles of International Commercial Contracts, Rome (UNIDROIT) 1994, 256 p. [for English text of the Principles and the Commentary to the Principles on the Internet, see: the UNIDROIT website at http://www.unidroit.org/english/principles/contents.htm]; Principes relatifs aux contrats du commerce international [Principles of International Commercial Contracts - in French], Rome: UNIDROIT (1994) 263 p.

Spanish edition reviewed by VATIER FUENZALIDA (1999)


1998/1999. UNIDROIT Principles of International Contracts as a legal framework for international business transactions. Discussion of presentations by Widmer, Bonell and Vischer, in: 1 European Journal of Law Reform [EJLR] (1998/1999) 325-330; Discussion of presentations by Schwenzer and Schlechtrie (the latter presented by Schmidt-Kessel), in: 1 EJLR (1998/1999) 338-344


2004. Announcement by UNIDROIT: "At its annual session (19-21 April 2004) the Governing Council of UNIDROIT adopted unanimously the new edition of the UNIDROIT Principles of International Commercial Contracts. As compared to the current 1994 edition, UNIDROIT Principles 2004 contains 5 new chapters (Authority of Agents; Third Party Rights; Set-off; Assignment of Rights, Transfer of Obligations and Assignment of Contracts; Limitation Periods) as well as an expanded Preamble and new provisions on Inconsistent Behaviour and on Release by Agreement. Moreover wherever appropriate the 1994 edition of the Principles was adapted to meet the needs of electronic contracting." (May 2004)


1998. A new approach to International Commercial Law: The UNIDROIT Principles of International Commercial Contracts, XVth International Congress of Comparative Law (Bristol 26 July - 1 August 1998), summary report at http://www.unidroit.org/english/principles/1998-bristol.htm


1984. Libor amicorum, Jean Georges Sauveplanne [including contributions by Diamond, Farnsworth, van der Velden], Deventer: Kluwer (1984) 307 p.


1979. Symposium [papers by Bergsten & Miller, Eörsi, Farnsworth, Honnold, Michida, Nicholas, Roth], in: 27 American Journal of Comparative Law (Berkeley, CA) (1979) 223-352


1995. Proceedings of the Congress of the United Nations Commission on International Trade Law (New York 18-22 May 1992) [including papers by Date-Bah, Eyzaguirre, Hartnell, van Houtte, Piltz, Sher, Zang Yuqing; floor contributions by Carpio, El-Sharkawi, Hiscock, Hjernr, Kahn, King, Quiñones Escamez, Rider], New York: United Nations (1995) 276 p. [see UNCITRAL 1992 UNCITRAL Secretariat for summary of contents]


1982. Proceedings of the Sixty-fourth Annual Meeting, Montebello, Québec (August 1982)

UNILEX and UNIDROIT on the Internet

The official UNIDROIT World Wide Web site, which is available in its entirety in both English and French, may be accessed at <http://www.unidroit.org>. UNILEX on the Internet <http://www.unilex.info/> is a newer development.

Edited by Michael Joachim Bonell, UNILEX is based on a research project started in 1992 by the Centre for Comparative and Foreign Studies - a joint venture of the Italian National Research Council, the University of Rome I "La Sapienza", and the International Institute for the Unification of Private Law (UNIDROIT).

Their "about us" page describes this project:

     UNILEX is an "intelligent" database of international case law and bibliography on the United Nations Convention on Contracts for the International Sale of Goods (CISG) and the UNIDROIT Principles of International Commercial Contracts - two of the most important international instruments for the regulation of international commercial transactions.

     UNILEX contains:

  • detailed abstracts of the most important cases decided under both instruments by courts and arbitral tribunals worldwide;
  • the full text of each decision in its original language (when available);
  • the complete texts of the CISG and the UNIDROIT Principles;
  • a status report on the state of ratifications of CISG, including reservations and declarations by States Parties;
  • a vast bibliography for each instrument.

     UNILEX provides access to the decisions and arbitral awards by:

  • date;
  • country or arbitral tribunal;
  • article number of the instrument;
  • specific issues listed under each article.

     UNILEX provides access to the bibliography by:

  • author;
  • article number of the instrument;
  • area.

This material is in addition available in printed loose-leaf texts marketed by Transnational Publishers, Inc., of Ardsley, New York. There is also a portion of the UNIDROIT website devoted exclusively to the UNIDROIT Principles of International Commercial Contracts; see <http://www.unidroit.org/english/principles/pr-main.htm>.

Researchers are reminded that the complete version of the UNIDROIT Principles contains not only the black-letter rules but also detailed comments on each article including, where appropriate, illustrations. This complete version of the UNIDROIT Principles may be ordered from UNIDROIT, Via Panisperna 28, 00184 Rome, Italy, or seen on the Internet at: <http://www.unidroit.org/english/principles/contents.htm>.

UNITED KINGDOM: Domestic documents

1978. Law Commission. Report No. 88. Interest, Command Papers: 5th series 7229 (1978)

1989. United Kingdom Department of Trade and Industry. United Nations Convention on Contracts for the International Sale of Goods: a consultative document, London: Department of Trade and Industry (1989) 81 p.

1986. Law Commission. Report No. 154. Law of Contract: The Parol Evidence Rule, Command Papers: 5th series 9700 (1986)

1996. Law Commission. Report No. 242. Privity of Contract: Contracts for the Benefit of Third Parties, Command Papers: 6th series 3329 (1996)

1997. Department of Trade and Industry, United Nations Convention on Contracts for the International Sale of Goods (The Vienna Sales Convention): A Consultation Document, London: Department of Trade and Industry (1997)

1999. Department of Trade and Industry, United Nations Convention on Contracts for the International Sale of Goods (Vienna Sales Convention): Position Paper, London: Department of Trade and Industry (1999)


2012. UNCITRAL digest of case law on the United Nations Convention on Contracts for the International Sale of Goods. New York, United Nations (2012) 694 p. available online at <http://www.uncitral.org/uncitral/en/publications/publications.html>


2012. UNCITRAL Digest of Case Law on the United Nations Convention on Contracts for the International Sale of Goods, 30 J.L. & Com. (2012) 3-694


2013. Brasil adere à Convenção da ONU sobre contratos internacionais de compra e venda de mercadorias [Brazil Accedes to CISG (1980) - in Portuguese], ONUBR: Nações Unidas no Brasil 5 March 2013, available online at <http://www.onu.org.br/brasil-adere-a-convencao-da-onu-sobre-contratos-internacionais-de-compra-e-venda-de-mercadorias>



1981. Official Records: Documents of the Conference and Summary Records of the Plenary Meetings and of the Meetings of the Main Committees (Vienna, 10 March - 11 April 1980), U.N. Doc. A/Conf.97/19, New York: United Nations (1981) 487 p.


Official UN texts currently available on the Pace database: English text; French text; Spanish text. Other texts currently available: Czech text, Danish text, Dutch text, Finnish text, German text, Japanese text, Norwegian text, Persian text, Polish text, Portuguese text, Swedish text


1974/1980. Convention on the Limitation Period in the International Sale of Goods (concluded at New York on 14 June 1974) as amended by the Protocol Amending the Convention on the Limitation Period in the International Sale of Goods (concluded at Vienna on 11 April 1980) [English text] [Presentation accompanied by Explanatory Note by the UNCITRAL Secretariat]. See the 1978 bibliography reference under Sono to the commentary by him on the 1974 Limitation Convention; see also: 20 May - 14 June 1974; official records; documents of the conference and summary records of the plenary meetings and of the meetings of the main committee, United Nations: New York (1975)


UNITED STATES: Domestic documents

1981-1987. U.S. State Department Documents. Report of the United States Delegation to the United Nations Conference on Contracts for the International Sale of Goods at Vienna, Austria, March 10 to April 11, 1980, submitted to the Secretary of State, prepared by John O. Honnold, Co-Chairman of the Delegation [1981]; Legal Analysis of the United Nations Convention on Contracts for the International Sale of Goods (1980), U.S. Senate Treaty Doc. No. 98-9, 98th Cong., 1lst Sess. 1-18 (1983), reprinted in 22 Int'l Legal Materials 1368-1380 (1984), and in: International Sales: The United Nations Convention on Contracts for the International Sale of Goods, Galston & Smit eds., Appendix I (New York: Matthew Bender, 1984); U.S. Senate Proceedings. [Introduced to Senate] 120 Cong. Rec. S12655 (Sept. 21, 1983); [Message of President transmitting to U.S. Senate text of UN Sales Convention and legal analysis of Convention prepared by U.S. Department of State] Senate Treaty Doc. No. 98-9, 98th Cong., 1st Sess. (1983), reprinted in International Sales: The United Nations Convention on Contracts for the International Sale of Goods, Galston & Smit, eds., Appendix I (New York: Matthew Bender, 1984); in: Kathrein/MaGraw eds., The Convention for the International Sale of Goods: A Handbook of Basic Materials, Washington, D.C.: ABA (1987) 69-92; [Senate Hearings] International Sale of Goods: Hearing on Treaty Doc. No. 98-9 Before the Senate Committee on Foreign Relations, 98th Cong., 2nd Sess. (1984) (S. Hrg. 98-837, April 4, 1984); [Senate Committee Report] Exec. Rep. 99-20, 99th Cong., 2nd Sess. (1986); [Senate consideration] 132 Cong. Rec. S15767-15768, 15773-15774 (daily ed. Oct. 9, 1986); U.S. Ratification of 1980 United Nations Convention on Contracts for the International Sale of Goods. Official English text, in: Federal Register (Washington, D.C.) 52 (1987) 6262, 6264-6280; reprinted in: United States Code Annotated, Title 15, Appendix (Supp. 1987)


1998. Contratación internacional. Comentarios a los Principios sobre los Contratos Comerciales Internacionales del Unidroit [ - in Spanish], Universidad Nacional Autónoma de México - Universidad Panamericana (1998)


1982. (Kaufrechtskonvention) [Convention on Commercial Law - in German], Textausgabe/Ein fürung von Jochen Völter, Berlin (Kammer für Aussenhandel der DDR) 1982

URIBE, Rodrigo Momberg

2011. The Effect of a Change of Circumstances on the Binding Force of Contracts - Comparative Perspectives, vol. 94: published under the auspices of METRO, the Instiute for Transnational Legal Research of Maastricht University, Intersentia (2011) 327 p.

URIBE, Rodrigo Momberg

2011. Change of Circumstances in International Instruments of Contract Law: The approach of the CISG, PICC, PECL and DCFR, 15 Vindobona Journal of International Commercial Law and Arbitration (Vienna) (2011/2) 233-266

URIBE, Rodrigo Momberg

2012. Compraventa internacional de mercaderías: el deber de renegociación en caso de excesiva onerosidad sobrevenida [ - in Spanish], Revista Chilena de derecho privado (Santiago) vol. 18 (2012) 95-119 available online at <http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-80722012000100002>

USCHAKOW, Alexander

1978. Vereinheitlichung des Kaufrechts im Ost- West- Verhältnis [Unifying sales law in the East-West relationship - in German], Köln: Heymanns (1978) 235 p.

USSING, [Denmark]

1961. Obligationsretten, Almindelig Del [ - in Danish], 4th ed., Vinding Kruse ed. (1961)

USSING, [Denmark]

1962. Køb [ - in Danish], 4th ed., Vinding Kruse ed. (1962)

USSING, / AFTALER, [Denmark]

1950. Aftaler [ - in Danish], 3d ed. (1950)