Hajiyev, Nazim, Manafova Mansura, Elena Sverdlikova, Roman Safronov, and Tatyana Vityutina. “Oligopoly Trends in Energy Markets: Causes, Crisis of Competition, and Sectoral Development Strategies”. International Journal of Energy Economics and Policy 11, no. 6 (November 3, 2021): 392–400. Accessed December 23, 2024. https://mail.econjournals.com/index.php/ijeep/article/view/11634.