1. Simulation and evaluation of an air conditioning heat recovery system with use of heat pumps;Yamashita,1982
2. Calculation of long term solar collector heating system performance;Swanson;Solar Energy,1977
3. Sistema di controllo ottimo per impianti termici elioassistiti a recupero di energia;Cauli,1983
4. A heat pump driven optimal heating system;Salimbeni,1982