CHORNII, N. EU energy security in the context of The Russian Federation’s change in energy strategy: the geopolitical aspect. Przegląd Politologiczny, [S. l.], n. 3, p. 167–175, 2015. DOI: 10.14746/pp.2015.20.3.12. Disponível em: https://pressto.amu.edu.pl/index.php/pp/article/view/5504. Acesso em: 7 luty. 2023.