Ostapenko, Olga, і Olexandre Slobodianiuk. «ENERGY, ECOLOGICAL AND ECONOMIC EFFICIENCY OF STEAM COMPRESSOR HEAT PUMP PLANTS AS COMPARED WITH ALTERNATIVE SOURCES OF HEAT SUPPLY». 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/412.