RATAJCZAK, Marek. Infrastructural conditions of Poland`s integration with the European Union. Economics and Business Review, Poland, v. 1, n. 1, p. 91–102, 2001. DOI: 10.18559/ebr.2001.1.482. Disponível em: https://journals.ue.poznan.pl/ebr/article/view/482. Acesso em: 4 apr. 2025.