1. Handbook of Systems and Equipment,2004
2. Handbook of HVAC Applications,2007
3. Charters, W.W.S., de Forest, L., Dixon, C.W.S., Taylor, L.E., 1980. Design and performance of some solar booster heat pumps. In: ANZ Solar Energy Society Annual Conference, Melbourne, Australia.
4. The performance of solar water heaters with natural circulation;Close;Solar Energy,1962
5. Duff, W.S., 1996. Advanced Solar Domestic Hot Water Systems, International Energy Agency, Task 14. Final Report.