KIRICHENKO, O. S.; KOMZOLOV, A. A.; NAZAROVA, Y. A.; SHCHERBAKOVA, N. S.; KIRICHENKO, T. V. Diversification of Russian Oil and Gas Upstream Companies. International Journal of Energy Economics and Policy, [S. l.], v. 10, n. 3, p. 112–118, 2020. Disponível em: https://econjournals.com/index.php/ijeep/article/view/9194. Acesso em: 25 apr. 2024.