1. International Energy Agency, Energy Poverty, How to Make Modern Energy Access Universal, World Energy Outlook (2010)
2. Stern, D.: The Role of Energy in Economic growth, The Oil Drum, (October 20, 2011)
3. International Energy Agency, Technology Road Map, Biofuels for Transport (2011)
4. US EPA. “RFS2” Federal policy drivers for increased biofuels usage (January 2009),
http://www.epa.gov
5. U.S. Energy Information Administration, Growth slows in U.S. ethanol production and consumption, Today in Energy (September 14, 2011),
http://www.eai.gov