M. Saiymova, N. Baikadamov, Y. Tyurina, G. Kutsuri, L. Sanginova, and M. Troyanskaya, “Russia’s Petroleum Industry in the Period of Sanctions and COVID-19 Pandemic: A Review and Analysis”, IJEEP, vol. 11, no. 5, pp. 483–489, Aug. 2021.