Hartz, Andrea, Sascha Saad, Lydia Schniedermeier, Mark Fleischhauer, and Stefan Greiving. “Securing of Mineral Resources in Spatial and Regional Planning”. Raumforschung und Raumordnung | Spatial Research and Planning 76, no. 4 (August 31, 2018): 345–362. Accessed May 24, 2025. https://rur.oekom.de/index.php/rur/article/view/379.