KUMOR, M.; PORADA, S. A common gas market for Visegrad Group countries. Eastern Review, [S. l.], v. 9, p. 131–148, 2020. DOI: 10.18778/1427-9657.09.09. Disponível em: https://czasopisma.uni.lodz.pl/eastern/article/view/9898. Acesso em: 6 maj. 2024.