Onyusheva, Irina, Denis Ushakov, and Hung Tran Van. “The Eco-Problems and Green Economy Development in Kazakhstan: An Analytical Survey”. International Journal of Energy Economics and Policy 8, no. 2 (March 20, 2018): 148–153. Accessed April 30, 2024. https://www.econjournals.com/index.php/ijeep/article/view/6274.