http://www.sciencedirect.com/science/article/pii/S1876610209008030 http://www.sciencedirect.com/science/article/pii/S1876610209... http://www.geothermal-energy

http://www.sciencedirect.com/science/article/pii/S1876610209008030 http://www.sciencedirect.com/science/article/pii/S1876610209... http://www.geothermal-energy.org/pdf/IGAstandard/WGC/2010/2308.pdf http://www.geothermal-energy.org/pdf/IGAstandard/WGC/2010/23...