PIONTEK, Franciszek; PIONTEK, Barbara. The contemporary concepts of development in terms of the diversifying criteria. Problemy Ekorozwoju , [S. l.], v. 9, n. 1, p. 57–62, 2014. Disponível em: https://ph.pollub.pl/index.php/preko/article/view/4891. Acesso em: 20 feb. 2026.