6B [Implied agreement to apply Convention: choice of German place of arbitration = implicit choice of German law = applicability of CISG];

7B [Materials for interpretation of Convention: international case law and scholarly studies];

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

49A1 [Grounds for avoidance: fundamental breach of contract];

73A ; 73B [Fundamental breach with respect to installment; Refusal of future installments];

84A [Restitution of benefits received: seller bound to refund price must pay interest]