Kühne, Olaf, and Rainer Duttmann. “Recent Challenges of the Ecosystems Services Approach from an Interdisciplinary Point of View”. Raumforschung und Raumordnung | Spatial Research and Planning 78, no. 2 (April 30, 2020): 171–184. Accessed May 2, 2024. https://rur.oekom.de/index.php/rur/article/view/278.