Marzelli, Stefan, and Florian Lintzmeyer. “Transnational Needs of Sustainable Spatial Development in the Alps: Results from an Analysis of Policy Documents”. Acta geographica Slovenica 55, no. 2 (July 6, 2015): 351–361. Accessed May 6, 2024. https://ojs.zrc-sazu.si/ags/article/view/1585.