Ostapenko, Olga. «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 (Жовтень 1, 2017). дата звернення Травень 28, 2026. https://works.vntu.edu.ua/index.php/works/article/view/510.