Schimmelfennig, Frank.

Integration and differentiation in the European Union = theory and policies / by: European Union.; European Union countries; European Union countries; Schimmelfennig, Frank.; SpringerLink (Online service); Rittberger, Berthold.; Leuffen, Dirk. (Electronic resources)

The EU, NATO and the Integration of Europe : = Rules and Rhetoric. by: Schimmelfennig, Frank.; Follesdal, Andreas.; Olsen, Johan P.; Ebooks Corporation. (Electronic resources)