Matraeva, Liliia V., Natalia A. Goryunova, Svetlana N. Smirova, Maria I. Babenko, Sergey G. Erokhin, and Peter V. Solodukha. 2017. ā€œMethodological Approaches to Estimation of Energy Efficiency Within the Framework of the Concept of Green Economy and Sustainable Developmentā€. International Journal of Energy Economics and Policy 7 (4):231-39. https://econjournals.com/index.php/ijeep/article/view/5288.