1. Breadbox Water Heater Plans;Baer,1975
2. Integral passive solar water heater performance;Bainbridge,1981
3. Climate in the UK;Bartholomew,1986
4. Side by side comparison study of integral passive solar water heaters;Burton,1981
5. Butti K. and Perlin J. (1980) A Golden Thread, Marion Boyars Publishers Ltd, London, UK.