Paschalis-Jakubowicz, Piotr. “Theoretical Basis and Implementation of the Idea of Sustainable Development in Forestry”. Problemy Ekorozwoju / Problems of Sustainable Development 6, no. 2 (July 1, 2011): 101–106. Accessed December 13, 2025. https://ph.pollub.pl/index.php/preko/article/view/4787.