1. Biofuels: Thinking Clearly about the Issues
2. Breaking the Biological Barriers to Cellulosic Ethanol: A Joint Research Agenda; DOE/SC-0095;Office of Science and Office of Energy Efficiency and Renewable Energy, U.S. Department of Energy, 2006; www.doegenomestolife.org/biofuels/.
3. Biomass Recalcitrance: Engineering Plants and Enzymes for Biofuels Production
4. Bush, G. W.State of the Union Address by The President,U.S. Capitol, Washington, DC, Jan 31, 2006; www.whitehouse.gov/stateoftheunion/2006/.
5. Renewable Fuels Association. Industry: ethanol biorefinery locations;http://www.ethanolrfa.org/industry/locations, accessed Jan 18, 2008.