“Unstrategic Partners: NATO's Relations with the European Union”, in Werner Kremp, Berthold Meyer und Wolfgang Tönnesmann (eds.) (2010) The Entangling Alliance: Die NATO auf dem Weg vom Verteidiungsbündnis zum Weltgendarmen?, Trier: Wissenschaftlicher Verlag Trier, pp. 41-77
“The European Union as an Integrative Power: From Effective Multilateralism to EU-NATO and EU-UN Interorganisationalism”, (2010), Brussels: VUB Press.
“The Paradox of Unity: Adverse Effects of the EU’s ‘One Voice’ Approach at the United Nations Human Rights Council” in Jan Wetzel (ed.) (2010) The EU as a Global Player in the Field of Human Rights, London: Routledge (with G. Macaj)
“The European Union and NATO: Shrewd Inter-organizationalism in the Making?” in Knud Erik Jørgensen (ed.) (2009), The European Union and International Organizations, London: Routledge (with J. Varwick)
“Military Crisis Management: The Challenge of Inter-organizationalism”, Joachim A. Koops (Ed.), Studia Diplomatica, Special Issue, Vol. 62, No. 3, October 2009, Brussels: Egmont Institute – Royal Institute for International Relations.
“Effective Inter-organizationalism? Lessons Learned from the Standby High Readiness Brigade for United Nations Operations (SHIRBRIG), in Joachim A. Koops (ed.) Military Crisis Management: The Challenge of Inter-organizationalism, Studia Diplomatica, Special Issue, Vol. 62, No. 3, October 2009, Brussels: Egmont Institute – Royal Institute for International Relations, pp. 81-9
“Towards Effective and Integrative Inter-organisationalism”, in Kathrin Brockmann, Hans Bastian Hans Bastian Hauck and Stuart Reigeluth (eds) From Conflict to Regional Stability: Linking Security and Development, Berlin: Forschungsinstitut der Deutschen Gesellschaft für Auswärtige Politik 2008, pp 23-31
“Ten Years of SHIRBRIG: Lessons Learned, Development Prospects and Strategic Opportunities for Germany”, GPPi Research Paper No. 11 (2008), Berlin: Global Public Policy Institute (with J. Varwick)
“UN SHIRBRIG and EU Battlegroups”, OCGG Security Recommendation No.6, 2007, Oxford: Oxford Council on Good Governance.
‘Exporting Stability or Importing Instability? The European Union at the Crossroads’, (in Johannes Varwick / Kai-Olaf Lang (eds) (2007), European Neighbourhood Policy: Challenges for the EU-Policy towards the New Neighbours, Opladen/Farmington Hills: Budrich Publishers. (with J. Varwick)
“Norge bør støtte unik FN-Brigade” (Norway should support unique UN-Brigade), OCGG Security Recommendation No .7, Nov. 2008, Oxford: Oxford Council on Good Governance (with A. Nilsen)
“Effective Multilateralism: The Future of the EU's External Identity in a System of Trilateral Security Governance”, 'New Europe 2020: Visions and Strategies for a Wider Europe', Turku: University of Turku.
'Effective Multilateralism in Peacekeeping, Capacity-Building and Crisis Management: The Challenge of Inter-organizational Cooperation', Focus Papers No. 1/2010, available at
http://www.effectivemultilateralism.info/content.asp?contentid=1661
