PTAK, Michał. Motor fuel taxes and the environmental protection. Oeconomia Copernicana, [S. l.], v. 2, n. 1, p. 29–48, 2011. DOI: 10.12775/OeC.2011.002. Disponível em: https://journals.economic-research.pl/oc/article/view/492. Acesso em: 24 jul. 2024.