Knieling, Jörg, Dietrich Fürst, and Rainer Danielzyk. “Can the Value of Regional Planning Be Enhanced by the Use of Co-Operation-Based Approaches?”. Raumforschung und Raumordnung | Spatial Research and Planning 59, no. 2-3 (March 31, 2001): 184–191. Accessed April 27, 2024. https://rur.oekom.de/index.php/rur/article/view/1215.