ŻUK, Anna. Catastrophe or Life – Contemporary Threats to Humankind and Earth. Problemy Ekorozwoju / Problems of Sustainable Development, [S. l.], v. 2, n. 2, p. 75–84, 2007. Disponível em: https://ph.pollub.pl/index.php/preko/article/view/4640. Acesso em: 14 dec. 2025.