Bleck, Markus, and Michael Wagner. “City-Hinterland- Migration in North Rhine-Westphalia — A Meta-Analysis”. Raumforschung und Raumordnung | Spatial Research and Planning 64, no. 2 (March 31, 2006): 104–115. Accessed December 6, 2024. https://rur.oekom.de/index.php/rur/article/view/1405.