Hull, Zbigniew. “The Philosophy of Sustainable Development and the Implementation of Its Postulates in Social Practice”. Studia Ecologiae et Bioethicae 17, no. 4 (December 31, 2019): 5–14. Accessed April 30, 2024. https://czasopisma.uksw.edu.pl/index.php/seb/article/view/6601.