BARTOSZCZUK, Paweł. Pojęcie gospodarki w obiegu zamkniętym. European Journal of Management and Social Science, [S. l.], v. 2, n. 1, p. 35–38, 2021. DOI: 10.56652/ejmss2021.1.4. Disponível em: https://ejmss-journal.com/index.php/ejmss/article/view/33. Acesso em: 31 sty. 2026.