Media type: E-Article Title: Zwanzig Jahre Maastricht – Welche Errungenschaften für den europäischen Bürger? Contributor: Ehlermann, Claus-Dieter imprint: Springer Science and Business Media LLC, 2013 Published in: ERA Forum Language: German DOI: 10.1007/s12027-013-0281-4 ISSN: 1612-3093; 1863-9038 Keywords: Law ; Political Science and International Relations Origination: Footnote: