1. Siemons, Bioenergy’s role in the EU energy market: a view of developments until 2020, Report to the European Commission, 2004.
2. Farrell J, Report on DOE’s Energy Efficiency and Renewable Energy Biomass Program, U.S. Department of Energy: Biological and Environmental Research Advisory Committee, 2007. Retrieved October 4, 2010, from 〈www.science.doe.gov/ober/berac/Ferrell05-07.ppt〉.
3. Bio-energy in Europe: changing technology choices;Faaij;Energy Policy,2006
4. Union of Concerned Scientists, How hydroelectric energy works, The Union of Concerned Scientists. Retrieved October 6, 2010, from 〈http://www.ucsusa.org/clean_energy/technology_and_impacts/energy_technologies/water-energy-electricity-cooling-power-plant.html〉.
5. Waver energy: technology transfer and generic R & D recommendations;Scarr;Arup Energy Ove Arup & Partners International,2001