Makhanov, Sagat S., Urpash Zh. Shalbolova, and Yevgeniy G. Kim. “Investing in Diversification: Oil Industry of Kazakhstan”. Business: Theory and Practice 24, no. 2 (August 8, 2023): 325–333. Accessed November 23, 2024. https://bmee.vgtu.lt/index.php/BTP/article/view/16823.