ARMSTEAD, H.C.H., 1983. Geothermal Energy. E. & F. N. Spon, London, 404 pp.
AXELSSON, G. and GUNNLAUGSSON, E., 2000. Background: Geothermal utilization, management and monitoring. In: Long-term monitoring of high- and low enthalpy fields under exploitation, WGC 2000 Short Courses, Japan, 3-10.
BARBIER, E. and FANELLI, M., 1977. Non-electrical uses of geothermal energy. Prog. Energy Combustion Sci., 3, 73-103.
BEALL, S. E, and SAMUELS, G., 1971. The use of warm water for heating and cooling plant and animal enclosures. Oak Ridge National Laboratory, ORNL-TM-3381, 56 pp.
BENDERITTER, Y. and CORMY, G., 1990. Possible approach to geothermal research and relative costs. In:Dickson, M.H. and Fanelli, M., eds., Small Geothermal Resources: A Guide to Development and Utilization, UNITAR, New York, pp. 59-69.
BROWN, K. L., 2000. Impacts on the physical environment. In: Brown, K.L., ed., Environmental Safety and Health Issues in Geothermal Development, WGC 2000 Short Courses, Japan, 43-56.
BUFFON, G.L., 1778. Histoire naturelle, generale et particuliere. Paris, Imprimerie Royale, 651p.
BULLARD, E.C., 1965. Historical introduction to terrestrial heat flow. In :Lee, W.H.K., ed. Terrestrial Heat Flow, Amer. Geophys. Un., Geophys. Mon. Ser., 8, pp.1-6.
COMBS, J. and MUFFLER, L.P.J., 1973. Exploration for geothermal resources. In : Kruger, P. and Otte, C., eds., Geothermal Energy, Stanford University Press, Stanford, pp.95-128.
ENTINGH, D. J., EASWARAN, E. and McLARTY, L., 1994. Small geothermal electric systems for remote powering. U.S. DoE, Geothermal Division, Washington, D.C., 12 pp.
FRIDLEIFSSON, I.B., 2001. Geothermal energy for the benefit of the people. Renewable and Sustainable Energy Reviews, 5, 299-312.
FRIDLEIFSSON, I. B., 2003. Status of geothermal energy amongst the world’s energy sources. IGA News, No.52, 13-14.
GARNISH, J.D., ed., 1987. Proceedings of the First EEC/US Workshop on Geothermal Hot-Dry Rock Technology, Geothermics, 16, 323-461.
GUDMUNDSSON, J.S., 1988. The elements of direct uses. Geothermics, 17,119-136.
HOCHSTEIN, M.P., 1990. Classification and assessment of geothermal resources. In: Dickson, M.H. and Fanelli, M., eds., Small Geothermal Resources: A Guide to Development and Utilization, UNITAR, New York, pp. 31-57.
HUTTRER, G.W., 2001. The status of world geothermal power generation 1995-2000. Geothermics, 30, 7-27.
INTERNATIONAL GEOTHERMAL ASSOCIATION, 2001. Report of the IGA to the UN Commission on Sustainable Development, Session 9 (CSD-9) , New York, April.
LINDAL, B., 1973. Industrial and other applications of geothermal energy. In: Armstead, H.C.H., ed., Geothermal Energy, UNESCO, Paris, pp.135-148.
LUBIMOVA, E.A., 1968. Thermal history of the Earth. In: The Earth's Crust and Upper Mantle, Amer. Geophys. Un., Geophys. Mon. Ser., 13, pp.63-77.
LUMB, J. T., 1981. Prospecting for geothermal resources. In: Rybach, L. and Muffler, L.J.P., eds., Geothermal Systems, Principles and Case Histories, J. Wiley & Sons, New York, pp. 77-108.
LUND, J. W., SANNER, B., RYBACH, L., CURTIS, R., HELLSTROM, G., 2003. Ground-source heat pumps. Renewable Energy World, Vol.6, no.4, 218-227.
LUND, J. W., 2003. The USA country update. IGA News, No. 53, 6-9.
LUND, J. W., and BOYD, T. L., 2001. Direct use of geothermal energy in the U.S. 2001. Geothermal Resources Council Transactions, 25, 57-60.
LUND, J. W., and FREESTON, D., 2001. World-wide direct uses of geothermal energy 2000. Geothermics 30, 29- 68.
LUNIS, B. and BRECKENRIDGE, R., 1991. Environmental considerations. In: Lienau, P.J. and Lunis, B.C.,eds., Geothermal Direct Use, Engineering and Design Guidebook, Geo-Heat Center, Klamath Falls, Oregon, pp.437-445.
MEIDAV,T.,1998. Progress in geothermal exploration technology. Bulletin Geothermal Resources Council, 27, 6,178-181.
MUFFLER, P. and CATALDI, R., 1978. Methods for regional assessment of geothermal resources. Geothermics, 7, 53-89.
NICHOLSON, K., 1993. Geothermal Fluids. Springer Verlag, Berlin, XVIII 264 pp.
POLLACK, H.N., HURTER, S.J. and JOHNSON, J.R.,1993. Heat flow from the Earth's interior: Analysis of the global data set. Rev. Geophys. 31, 267-280.
RAFFERTY, K., 1997. An information survival kit for theprospective residential geothermal heat pump owner. Bull. Geo-Heat Center, 18, 2, 1-11.
SANNER, B., KARYTSAS, C., MENDRINOS, D. and RYBACH, L., 2003. Current status of ground source heat pumps and underground thermal energy storage. Geothermics, Vol.32, 579-588.
STACEY, F.D. and LOPER, D.E., 1988. Thermal history of the Earth: a corollary concerning non-linear mantle rheology. Phys. Earth. Planet. Inter. 53, 167 -174.
STEFANSSON,V., 2000. The renewability of geothermal energy. Proc. World Geothermal Energy, Japan. On CD-ROM
TENZER, H., 2001. Development of hot dry rock technology. Bulletin Geo-Heat Center, 32, 4, 14-22.
WERES, O., 1984. Environmental protection and the chemistry of geothermal fluids. Lawrence Berkeley Laboratory, Calif. ,LBL 14403, 44 pp.
WHITE, D. E., 1973. Characteristics of geothermal resources. In: Kruger, P. and Otte, C.,eds., Geothermal Energy, Stanford University Press, Stanford, pp. 69-94.
WRIGHT, P.M., 1998. The sustainability of production from geothermal resources. Bull. Geo-Heat Center, 19, 2, 9-12.