SAFONOV, Maxim. Investments in the energy sector. Gosudarstvennaya Sluzhba, [S. l.], v. 16, n. 6, p. 57–61, 2014. Disponível em: https://gosudarstvennaya-sluzhba.owebs.ru/article/view/22002. Acesso em: 9 nov. 2026.