Olga, Ostapenko. «SUBSTANTIATION OF THE METHOD 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. 1 (Червень 29, 2018). дата звернення Травень 4, 2026. https://works.vntu.edu.ua/index.php/works/article/view/526.