- International law as law of the European Union, edited by Enzo Cannizzaro, Paolo Palchetti and Ramses A. Wessel
- Customary international law on the use of force, a methodological approach, edited by Enzo Cannizzaro and Paolo Palchetti ; with a foreword by Bruno Simma
- International law as law of the European Union, edited by Enzo Cannizzaro, Paolo Palchetti, Ramses A. Wessel
- Customary International Law on the Use of Force, A Methodological Approach, edited by Enzo Cannizzaro, Paolo Palchetti