PIONTEK, Barbara. Contemporary Conditions of Socio-economic Development (Synthetics Approach). Problemy Ekorozwoju, [S. l.], v. 5, n. 2, p. 117–124, 2010. Disponível em: https://ph.pollub.pl/index.php/preko/article/view/4752. Acesso em: 16 nov. 2024.