Ion Dosa. "COMPARATIVE EXERGY ANALYSIS OF A SINGLE STAGE HEAT PUMP AND A HEAT PUMP CASCADE OPERATING AT DIFFERENT TEMPERATURE LIFTS." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 15th International Multidisciplinary Scientific GeoConference SGEM2015, ENERGY AND CLEAN TECHNOLOGIES (2015). https://doi.org/10.5593/sgem2015/b41/s17.016