CIEŚLUKOWSKI, Maciej. A rational system of the own resources for the European Community. Economics and Business Review, Poland, v. 5, n. 2, p. 5–24, 2005. DOI: 10.18559/ebr.2005.2.521. Disponível em: https://www.journals.ue.poznan.pl/ebr/article/view/521. Acesso em: 6 jul. 2025.