- "Realism and Justice in International Law: Building Bridges or Blowing Them Up?" (1999)
- "Stagnation and Innovation in International Law" (2001)
- "The Law and Practice of International Criminal Law" (2003)
- "The Oxford Handbook on the Use of Force in International Law" (2015)
- "International Law for the 21st Century: Foundations and Future Perspectives" (2016)
- "Principles of European Law" (2021)
Articles:
- "The Evolution of the Right to Self-Determination in International Law" (1991)
- "Between Sovereignty and Humanity: The Elusive Search for a Global Moral Order" (1995)
- "Humanitarian Intervention and the Law" (1999)
- "Globalization and Human Rights: A Critical Analysis" (2002)
- "The International Legal Framework for the Use of Force" (2007)
- "International Law and the Protection of Human Rights: A Critical Assessment" (2009)
Other Publications:
- "A Commentary on the UN Security Council's Use of Force Resolution in Libya" (2011)
- "The Responsibility to Protect: A Critical Examination of the International Community's Response to Mass Atrocities" (2012)
- "The Future of International Law: A Critical Assessment" (2014)
- "The Oxford Handbook on International Law in Armed Conflict" (2017)
- "The Cambridge Handbook of International Law" (2018)