Polanska, Alla Stepanivna. 2014. “Energy Effeciency of the Industrial Development: the Current State and Perspectives”. Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas (Series: Economics and Management in the Oil and Gas Industry) 1 (9):61-66. https://eung.nung.edu.ua/index.php/ecom/article/view/192.