SZTUMSKI, Wieslaw. A Few Remarks on Sustainable Development of the Education Sphere. Postulated and Factual Improving of Education. Problemy Ekorozwoju, [S. l.], v. 19, n. 1, p. 251–260, 2024. DOI: 10.35784/preko.5434. Disponível em: https://ph.pollub.pl/index.php/preko/article/view/5434. Acesso em: 22 jul. 2024.