SZCZYGIEŁ, Elżbieta. Circular economy – a new concept or a necessity. Sprawy Międzynarodowe, [S. l.], v. 74, n. 3, p. 147–168, 2021. DOI: 10.35757/SM.2021.74.3.12. Disponível em: https://czasopisma.isppan.waw.pl/sm/article/view/1798. Acesso em: 17 lip. 2024.