Frank Schimmelfennig

Differentiated Integration: Explaining Variation in the European Union

By Dirk Leuffen, Berthold Rittberger, Frank Schimmelfennig

Democracy Promotion by Functional Cooperation: The European Union and its Neighbourhood

By Tina Freyburg, Sandra Lavenex, Frank Schimmelfennig, Tatiana Skripka, Anne Wetzel