2009. Interpretation Provisions of the UNIDROIT Principles: Introduction, Arts. 4.1 (Intention of the parties), 4.2 (Interpretation of statements or other conduct), 4.3 (Relevant circumstances), 4.4 (Reference to contract or statement as a whole), 4.5 (All terms to be given effect), 4.6 (Contra proferentem rule), 4.7 (Linguistic discrepancies), 4.8 (Supplying an omitted term) in: Stefan Vogenauer / Jan Kleinheisterkamp eds., Commentary on the UNIDROIT Principles of International Commercial Contracts, (PICC), Oxford University Press (2009) 491-539