Küpper, Patrick. “Regional Policy Reactions to Demographic Change in Sparsely Populated, Peripheral Areas: Evidence from a Survey in Germany”. Raumforschung und Raumordnung | Spatial Research and Planning 68, no. 3 (June 30, 2010): 169–180. Accessed July 19, 2025. https://rur.oekom.de/index.php/rur/article/view/877.