Ostapenko, Olga. 2017. “METHODICAL FUNDAMENTALS OF COMPLEX ASSESSMENT OF ENERGY-ECOLOGICAL-ECONOMIC EFFICIENCY OF ENERGY SUPPLY SYSTEMS WITH COGENERATION HEAT PUMP INSTALLATIONS AND PEAK SOURCES OF HEAT”. Scientific Works of Vinnytsia National Technical University, no. 3 (October). https://works.vntu.edu.ua/index.php/works/article/view/510.