Ostapenko, Olga, Iryna Valigura, і Anastasiya Kovalenko. «ENERGY ECOLOGICAL EFFICIENCY OF HEAT PUMPING STATIONS, OPERATING ON NATURAL AND INDUSTRIAL SOURCES OF HEAT AT VARIABLE OPERATION MODES». Scientific Works of Vinnytsia National Technical University, no. 2 (Листопад 25, 2015). дата звернення Травень 7, 2026. https://works.vntu.edu.ua/index.php/works/article/view/376.