Ostapenko O. SPHERES OF HIGH ENERGY EFFICIENCY OF ENERGY SUPPLY SYSTEMS WITH COGENERATION-HEAT PUMP INSTALLATIONS OF SMALL POWER АND FUEL-FIRED BOILERS IN HEAT SUPPLY SYSTEMS. SWVNTU [інтернет]. 05, Липень 2017 [цит. за 20, Червень 2026];(1):1-8. доступний у: https://works.vntu.edu.ua/index.php/works/article/view/497