1. Evaluation of flat-plate solar heat collectors;Hottel,1955
2. The derivation of several “plate efficiency factors” useful in the design of flat-plate solar heat collectors;Bliss;Solar Energy,1959
3. Solar Energy Collection and Its Utilization for House Heating;Whillier,1953
4. Low Temperature Engineering Applications of Solar Energy;Whillier,1967
5. Solar Energy Thermal Processes;Duffie,1978