- 2015: Speaking with a Single Voice: The EU as an Effective Actor in Global Governance. London/New York: Routledge. (with Sophie Meunier).
- 2015: Internationale Organisationen: Autonomie, Politisierung, Koordination und Wandel, Politische Vierteljahresschrift Sonderheft 49, Baden-Baden: Nomos. (with Andrea Liese und Martin Koch).
- 2014: Speaking with a Single Voice: The EU as an Effective Actor in Global Governance, Special Issue of the Journal of European Public Policy, 21:7. (with Sophie Meunier).
