1. Armstead, H.C.H., 1983. Geothermal Energy. Its Past, Present and Future Contribution to the Energy Needs of Man. 2nd Edition. E. & F.N. Spon, London (404 pp).
2. Heat Mining: A New Source of Energy;Armstead,1987
3. Entropy Generation Through Heat and Fluid Flow;Bejan,1982
4. Possible approach to geothermal research and relative cost estimate;Benderitter,1990
5. The exergy of thermal water;Bodvarsson;Geothermics,1972