Ostapenko, Olga, Vadym Leshcnenko, and Roman Tikhonenko. “Energy Advantages of Application of Steam Compressor Heat Pumps With Electric and Cogeneration Drives”. Scientific Works of Vinnytsia National Technical University, no. 1 (November 24, 2015). Accessed October 21, 2020. https://works.vntu.edu.ua/index.php/works/article/view/437.