Khalid М. Н. . Analysis of the world production of petroleum products. ECONOMIC Series of the Bulletin of the L N Gumilyov ENU, [S. l.], n. 2, p. 108–118, 2023. DOI: 10.32523/2789-4320-2023-2-108-118. Disponível em: https://bulecon.enu.kz/index.php/main/article/view/677. Acesso em: 10 dec. 2024.