Ostapenko O, Bakum O. ECONOMIC EFFICIENCY OF HEAT-PUMPING STATIONS ON THE CONDITIONS OF FUEL AND ENERGY RESOURCES COST CHANGE AND VARIABLE OPERATION MODES. Scientific Works of Vinnytsia National Technical University [інтернет]. 25, Листопад 2015 [цит. за 27, Квітень 2026];(1). доступний у: https://works.vntu.edu.ua/index.php/works/article/view/406