POIANĂ, Oana. Eu’s Engagement in the Black Sea Regional Cooperation and the National Preferences of the Riparian States: a Zero Sum Game perpetuated by Energy Insecurity. [s.l.] : Presa Universitară Clujeană,2022. Disponível em: https://editura.ubbcluj.ro/index.php/puc/catalog/book/2680. Acesso em: 15 may. 2026.