1. Energy for sustainable development: a policy agenda;UNDP,2002
2. International Atomic Energy Agency (IAEA). Energy indicators for sustainable development: methodologies and guidelines. International Atomic Energy Agency (IAEA), United Nations Department of Economic and Social Affairs (UNDESA). Vienna: International Energy Agency (IEA), Eurostat, European Environment Agency (EEA); 2005.
3. Bertani Ruggero. Geothermal power generation in the world 2005–2010 update report. In: Proceedings of the world geothermal congress 2010. Bali: International Geothermal Association; 2010.
4. Intergovernmental Panel on Climate Change. Renewable energy sources and climate change mitigation: special report of the intergovernmental panel on climate change. Intergovernmental panel on climate change. New York: Cambridge University Press, p. 9; 2012.
5. Hunt Trevor M. Five lectures on environmental effects of geothermal utilization. Taupo, New Zealand: Institute of Geological and Nuclear Sciences, United Nations University, Geothermal Training Program; 2001.