TY  - BOOK
AU  - Schimmelfennig & Winzen
TI  - Ever Looser Union?: Differentiated European Integration
SN  - 9780191888625
PY  - 2020///
PB  - OUPOxford University Press
UR  - http://dx.doi.org/10.1093/oso/9780198854333.001.0001
ER  -