1. World energy technology outlook – WETO H2,2006
2. White Paper. Adapting to climate change: towards a European framework for action,2009
3. Geothermal energy: renewable energy and the environment;Glassley,2010
4. Intermittent renewable generation and the cost of maintaining power system reliability;Skea;IET Generation Transmission & Distribution,2008
5. The USA geothermal country update;Lund;Geothermics,2003