1. Ocean Thermal Energy Conversion;Takahashi,1996
2. Flavin C, O’Meara M. Financing solar electricity. World Watch 1997;10(3).
3. US Department of Energy. Annual energy outlook 2002 with projections to 2020. Report#: DOE/EIA-0383(2002), 2002, online http://www.eia.doe.gov/oiaf/aeo/
4. Wind energy;Herzog;Appraisal Journal,1999
5. House of Commons. Science and technology—seventh report: wave and tidal energy. London, April 30, 2001, online http://www.parliament.the-stationery-office.co.uk/pa/cm200001/cmselect/cmsctech/291/29102.htm.