- The United Nations at Age Fifty:A Legal Perspective (Legal Aspects of International Organization ; 23)
- Deutschlands Aktuelle Verfassungslage (Veroffentlichungen Der Vereinigung Der Deutschen Staatsrechtslehrer, Heft 49)
- The Statute of the International Court of Justice: A Commentary (Oxford Commentaries on International Law)
- Conciliation in International Law: The OSCE Court of Conciliation and Arbitration
- Flexibility in International Dispute Settlement : Conciliation Revisited







