TY - JOUR A1 - Schnell, I. T1 - Conceptual remarks for the understanding of city and border systems in a global reality JO - Geogr. Helv. J1 - GH VL - 62 IS - 1 SP - 43 EP - 51 Y1 - 2007/03/31 PB - Geographisch-Ethnographische Gesellschaft Zürich SN - 2194-8798 UR - https://gh.copernicus.org/articles/62/43/2007/ L1 - https://gh.copernicus.org/articles/62/43/2007/gh-62-43-2007.pdf DO - 10.5194/gh-62-43-2007 ER -