1. Axelsson, G., 2008. Management of geothermal resources. Presented at the Workshop for Decision Makers on Direct Heating Use of Geothermal Resources in Asia organized by UNU-GTP, TBLRREM and TBGMED, in Tianjin, China,11–18 May
2. Sustainable geothermal utilisation-case histories; definitions; research issues and modelling;Axelsson;Geometrics,2010
3. Benito, F.A., 1998. The role of government in Philippine geothermal energy development. Paper Presented at the 20th Anniversary Workshop, Geothermal Training Programme, Reykjavik, Iceland.
4. A review and analysis of the adequacy of the U.S. legal, institutional and financial framework for geothermal development;Bloomquist;Geothermics,1986
5. Bloomquist, R.G., 2003. United States geothermal policy-provision of access adn encouraging project development. Paper Presented at the International Geothermal Conference. Reykjavik, Iceland.