Ostapenko, Olga. «Complex Evaluation of Energy Efficiency of Steam Compressor Heat Pump Plants With сogeneration Drive». Scientific Works of Vinnytsia National Technical University, no. 3 (Листопад 10, 2015). дата звернення Травень 20, 2026. https://works.vntu.edu.ua/index.php/works/article/view/36.