1. Performance of flat-plate solar energy collectors;Hottel,1954
2. Solar energy heating;Tybout;Nat. Resour. J.,1970
3. Operating experience with solar water heating;Hyewood;J. Inst. Heat Vent. Energy,1971
4. On the optimum tilt of a solar collector;Kern;Solar Energy,1975
5. Cost of house heating with solar energy;Lof;Solar Energy,1973