2012. Democratization 19(3), with S. Grimm & J. Leininger.
2012. Zeitschrift für Internationale Beziehungen [German Journal of International Relations] 19(1).
2012. Democratization 19(3).
2012. European Foreign Affairs Review 17(2): 125–142.
2012. World Political Science Review 8(1): 1-45.
2011. Democratization 18(4): 1001-25.
2011. Zeitschrift für Internationale Beziehungen [German Journal of International Relations] 18(1): 5-46.
2011. Democratization 18(4): 1026-54, with S. Lavenex, F. Schimmelfennig, T. Skripka, A. Wetzel.
2010. Journal of European Public Policy 17(2): 262-80, with S. Richter.
2009. Journal of European Public Policy 16(6): 916-34, with S. Lavenex, F. Schimmelfennig, T. Skripka, A. Wetzel.
2010. S. Lavenex & F. Schimmelfennig (eds) EU External Governance: Projecting EU Rules beyond Membership. London, New York: Routledge, with S. Lavenex, F. Schimmelfennig, T. Skripka, A. Wetzel [reprint of 2009 JEPP article].
['Promoting Democratic Governance in the European Neighbourhood: An Innovative Model']
2009. G. Erdmann & M. Kneuer (eds) Externe Faktoren der Demokratisierung. Baden Baden: Nomos, 169-93, with S. Lavenex, F. Schimmelfennig, T. Skripka, A. Wetzel.