Mukhamediyev, Bulat, and Lazat Spankulova. “The Impact of Innovation, Knowledge Spillovers and Oil Prices on Economic Growth of the Regions of Kazakhstan”. International Journal of Energy Economics and Policy 10, no. 4 (May 16, 2020): 78–84. Accessed May 2, 2024. https://econjournals.com/index.php/ijeep/article/view/9034.