Ostapenko, Olga. “ENERGY EFFICIENCY OF ENERGY SUPPLY SYSTEMS WITH COGENERATION HEAT PUMP INSTALLATIONS АND PEAK SOURCES OF HEAT IN HEAT SUPPLY SYSTEMS”. Scientific Works of Vinnytsia National Technical University, no. 2 (August 26, 2016). Accessed April 19, 2024. https://works.vntu.edu.ua/index.php/works/article/view/472.