1. Testing and modelling of downhole heat exchanger in shallow system;Culver;Geothermal Resources Council Transaction,1978
2. Design considerations of a downhole coaxial geothermal heat exchanger;Horner;Geothermal Resources Council Transaction,1980
3. A study of the use of downhole heat exchanger in the Moana hot water area, Reno;Allis,1980
4. Down-hole coaxial heat exchanger using insulated inner pipe for maximum heat extraction;Morita;Geothermal Resources Council Transaction,1985
5. Downhole heat exchangers;Culver;Geo-Heat Center Bulletin,1989