Konaszczuk, Wojciech. “Cross-Border Cooperation Between Poland, Russia and Ukraine on Oil and Gas Trade — an Attempt at Reflection in the Context of Energy Security”. Regional Barometer. Analyses & Prognoses 16, no. 5(S) (August 26, 2019): 43–49. Accessed April 16, 2025. https://czaz.akademiazamojska.edu.pl/index.php/br/article/view/61.