Diaconescu, I. Thermal Calculation of Heat Pump for Two Types of Working Conditions. Analele Universităţii "Dunărea de Jos" din Galaţi. Fascicula XIV, Inginerie mecanică = Annals of “Dunarea de Jos“ University of Galati. Fascicle XIV, Mechanical Engineering 2022, 26, 15-18.