1. Heat Transfer;Holman,1981
2. Use of very low temperature geothermal water in radiator heating systems;Karlsson,1995
3. Modeling and control of geothermal heating systems;Simmons;ISA Translations,1981
4. Experience in developing and utilizing geothermal resources in Iceland;Thorhallson;Geothermics,1988
5. Low temperature geothermal engineering cost analysis compared to traditional heating in China;Wang,1995