Brixy, Udo, and Reinhold Grotz. “Geographical Variations in Business Start-up Activity and Chances of Survival in Western Germany from 1983 to 1997”. Raumforschung und Raumordnung | Spatial Research and Planning 60, no. 2 (March 31, 2002): 100–122. Accessed May 22, 2024. https://rur.oekom.de/index.php/rur/article/view/1552.