CZARNY, Elżbieta; MENKES, Jerzy; TOPOROWSKI, Patryk. Gazprom - threat to Europe?. Economics and Business Review, Poland, v. 9, n. 1, p. 44–66, 2009. DOI: 10.18559/ebr.2009.1.551. Disponível em: https://journals.ue.poznan.pl/ebr/article/view/551. Acesso em: 4 apr. 2025.