This paper reviews the multiple forms of European continental regionalism, which takes the overall shape of a complex set of concentric circles, with a substructure of a core group within the EU based on the euro and Schengen areas, and several rings of neighbors outside, including the European...

The aim of the paper is to identify and evaluate existing and potential EU energy supply risks on the basis of a sector-specific approach. Moving away from common generalizations on security of energy supply as well as from those studies that focus only on one sector, it brings together all...