@bookPart{Giegerich_2017,
title={How to Reconcile the Forces of Enlargement and Consolidation in “an Ever Closer Union”},
author={Giegerich, Thomas},
editor={Giegerich, Thomas and Schmitt, Desirée C. and Zeitzmann, Sebastian},
isbn={978-3-8452-7771-4},
doi={http://dx.doi.org/10.22028/D291-29650},
pages={15-58},
publisher={Nomos},
booktitle={Flexibility in the EU and Beyond : How Much Differentiation Can European Integration Bear?},
year={2017}
}