Otarbayeva, A., and A. Arupov. “Analysis of the Influence of Direct Foreign Investments on the Development of the Oil and Gas Industry of Kazakhstan”. Journal of Economic Research & Business Administration 134, no. 4 (December 28, 2020): 66–80. Accessed December 3, 2024. https://be.kaznu.kz/index.php/math/article/view/2245.