1. Evaluation of flat-plate solar heat collector;Hottel;Trans. ASME,1942
2. Solar Energy Collection and its Utilization for House Heating;Whillier,1953
3. The Effect of Various Parameters on the Design of Solar Energy Air Heaters;Buelow,1956
4. Drying grain with solar heated air;Buelow;Q. Bull. Mich. Agric. Exp. Stn.,1958
5. The derivations of several “plate-efficiency factors” useful in the design of flat-plate solar heat collectors;Bliss;Sol. Energy,1959