1. AAA., 2008. Daily Fuel Gauge Report. On-line. Retrieved August 11, 2008 〈http://www.fuelgaugereport.com/〉.
2. Biofuels: what is beyond ethanol and biodiesel?;Cascone;Hydrocarbon Processing,2007
3. Biodiesel Power: The Passion, The People, and the Politics of the Next Renewable Fuel;Estill,2005
4. Key informant interviews;Gilchrist,1992
5. Hill, J., Nelson, E., Tilman, D., Polasky, Tiffany, D., 2006. Environmental, economic, and energetic costs and benefits of biodiesel and ethanol biofuels. In: Proceedings of the National Academy of Sciences, 103, pp. 11206–11210.