1. Heat Pump Technology;Cube,1981
2. Heat Pumps;Heap,1979
3. The state of development and introduction of the heat pump in Austria;Reichl,1975
4. Probability design of a solar supplemented heat pump system for multiple farmstead applications;Gupta,1980
5. Performance of Heat Pumps Using Cold Side Energy Storage an Unconventional Heat Sources;Lawrence;ASME Paper, 74-WA/HT-17,1974