1. Climate Change and International Peace and Security: The Open Debate in the United Nations/Security Council on 20 July 2011;Wittig;German Yearbook of International Law,2011
2. Wallensteen P. , ‘Sanctions in Africa: International Resolve and Prevention of Conflict Escalation’, in T. Ohlson (ed.), From Intra-State War to Durable Peace: Conflict and Its Resolution in Africa after the Cold War (2012), 121–43