Ratner, Svetlana, and Еvgenii Khrustalev. “Learning Rates in Wind Energy: Cross-Country Analysis and Policy Applications for Russia”. International Journal of Energy Economics and Policy 8, no. 3 (May 8, 2018): 258–266. Accessed May 2, 2024. https://www.econjournals.com/index.php/ijeep/article/view/6234.