1. Impact of biofuel production on world agricultural markets: a computable general equilibrium analysis;Birur,2008
2. WWI. Biofuels for transportation. Global potential and implications for sustainable agriculture and energy in the 21st century. Extended summary. A report prepared by the World Watch Institute for the German Federal Ministry of Food, Agriculture and Consumer Protection, 2006, Available [online]: http://www.worldwatch.org/system/files/EBF038.pdf.
3. Ethanol production using corn, switchgrass, and wood; biodiesel production using soybean and sunflower;Pimental;Nat Resour Res,2005
4. Energy Information Administration (EIA). How much oil is consumed in the United States?. 2013. Available [online]: http://www.eia.gov/tools/faqs/faq.cfm?id=33&t=6
5. Energy 2020: North America, the New Middle East?;Morse,2012