KASZTELAN, Armand. Environmental Competitiveness of Regions – Attempt of Conceptualization. Problemy Ekorozwoju / Problems of Sustainable Development, [S. l.], v. 5, n. 2, p. 77–86, 2010. Disponível em: https://ph.pollub.pl/index.php/preko/article/view/4748. Acesso em: 13 dec. 2025.