SZTUMSKI, Ryszard. On Naturally Unsustainable and Artificially Sustainable Development. Problemy Ekorozwoju, [S. l.], v. 19, n. 2, p. 35–54, 2024. DOI: 10.35784/preko.5907. Disponível em: https://ph.pollub.pl/index.php/preko/article/view/5907. Acesso em: 3 jul. 2024.