Huttenloher, Christian. “INTERREG Rhine-Meuse Activities: An Initiative for Transnational High Water Prevention in the Rhine and Meuse Area”. Raumforschung und Raumordnung | Spatial Research and Planning 59, no. 5-6 (September 30, 2001): 359–369. Accessed May 3, 2024. https://rur.oekom.de/index.php/rur/article/view/1478.