Ostapenko, O., Valigura, I. і Kovalenko, A. (2015) «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, (2). доступний у: https://works.vntu.edu.ua/index.php/works/article/view/376 (дата звернення: 7Травень2026).