HAJIYEV, N.; MANSURA, M.; SVERDLIKOVA, E.; SAFRONOV, R.; VITYUTINA, T. Oligopoly Trends in Energy Markets: Causes, Crisis of Competition, and Sectoral Development Strategies. International Journal of Energy Economics and Policy, [S. l.], v. 11, n. 6, p. 392–400, 2021. Disponível em: https://www.econjournals.com/index.php/ijeep/article/view/11634. Acesso em: 29 mar. 2024.