1. Analysis of electric energy usage in air force homes;National Bureau of Standards;NBS Monograph No. 51,1962
2. Principles of design and sizing of automatic gas water heaters for maximum service efficiency;Conner,1944
3. Residential water heating: fuel conservation, economics and public policy;Mutch;Rand Corporation, R-1498-NSF,1974
4. E. E. Hebrank, Investivation of the performance of automatic storage type case and electric domestic water heaters. University of Illinois, Bulletin No. 436.
5. Pennsylvania State University, College of Agriculture, Water conservation and wasteflow reduction in the home. Special Circular No. 194.