LEJMAN , Jacek. Animals’ Ethics in the Light of the Idea of Sustainable Development. Problemy Ekorozwoju , [S. l.], v. 1, n. 2, p. 99–105, 2006. Disponível em: https://ph.pollub.pl/index.php/preko/article/view/4397. Acesso em: 30 jan. 2026.