MISHKOVICH, MASHA. Significant changes in international contracts on oil and gas purchase and sale. Gosudarstvennaya Sluzhba, [S. l.], v. 24, n. 4, p. 35–41, 2022. DOI: 10.22394/2070-8378-2022-24-4-35-41. Disponível em: https://gosudarstvennaya-sluzhba.owebs.ru/article/view/22913. Acesso em: 9 nov. 2026.