Mölders, Tanja, Anna Szumelda, and Uta von Winterfeld. “Sufficiency and Subsistence – on Two Important Concepts for Sustainable Development”. Problemy Ekorozwoju 9, no. 1 (January 2, 2014): 21–27. Accessed November 23, 2024. https://ph.pollub.pl/index.php/preko/article/view/4888.