Media type: E-Article Title: Of Systems, Boundaries, and Regionalisation Contributor: Kessler, Oliver; Helmig, Jan Published: Informa UK Limited, 2007 Published in: Geopolitics, 12 (2007) 4, Seite 570-585 Language: English DOI: 10.1080/14650040701546053 ISSN: 1465-0045; 1557-3028 Keywords: Political Science and International Relations ; Geography, Planning and Development Origination: Footnote: