BORYS, Tadeusz. Decade of Education for Sustainable Development – Polish Challenges. Problemy Ekorozwoju, [S. l.], v. 5, n. 1, p. 59–70, 2010. Disponível em: https://ph.pollub.pl/index.php/preko/article/view/4767. Acesso em: 22 jul. 2024.