ROTAR, N. The energy diplomacy of Ukraine as an effective and powerful tool for improving national energy security. The Copernicus Journal of Political Studies, [S. l.], n. 1, p. 33–53, 2018. DOI: 10.12775/CJPS.2018.003. Disponível em: https://apcz.umk.pl/CJPS/article/view/CJPS.2018.003. Acesso em: 19 jul. 2024.