Vitliemov, Pavel, Nikolay Kolev, and Milko Marinov. “Economic Evaluation of the Implementation of Policy Actions in the Field of Energy Efficiency”. International Journal of Energy Economics and Policy 9, no. 3 (April 8, 2019): 106–113. Accessed March 29, 2024. https://econjournals.com/index.php/ijeep/article/view/7719.