7B1 ; 7C23 [Materials for interpretation of Convention: international case law and scholarly studies; Gap-filling by domestic law];

9C [Practices established by the parties];

25B [Definition of fundamental breach];

26A [Notification of avoidance: effective declaration of avoidance];

29A [Parties by agreement may modify or terminate the contract];

49A1 [Buyer’s right to avoid contract (grounds for avoidance): fundamental breach of contract];

74A [General rules for measuring damages: loss suffered as consequence of breach];

79B13 ; 79G [Impediments excusing party from damages: impediment not avoidable or overcomeable; Other problems: substitute performance]