Chepurnyi, Mark, і Nataliia Rezident. «USAGE OF THE HEAT OF FLUE COMBUSTION PRODUCTS OF THE FUEL IN HEAT PUMPING INSTALLATIONS». Scientific Works of Vinnytsia National Technical University, no. 3 (Листопад 27, 2015). дата звернення Травень 20, 2026. https://works.vntu.edu.ua/index.php/works/article/view/385.