Bogachkova, Lyudmila Yurievna, and Shamam Garnikovna Khurshudyan. “Quantitative Analysis of Energy Efficiency Indices in the Regions of the Russian Federation As Exemplified by Energy Consumption”. International Journal of Energy Economics and Policy 5, no. 4 (October 14, 2015): 1033–1041. Accessed April 20, 2024. https://econjournals.com/index.php/ijeep/article/view/1448.