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 May 4, 2024. https://econjournals.com/index.php/ijeep/article/view/6274.