DENISOV, Yevgeniy. Principal actors of energy diplomacy. Gosudarstvennaya Sluzhba, [S. l.], v. 14, n. 3, p. 100–103, 2012. Disponível em: https://gosudarstvennaya-sluzhba.owebs.ru/article/view/21551. Acesso em: 9 nov. 2026.