1. Metz, B., Davidson, O.R., Bosch, P.R., Dave, R. & Meyer, L.A. Climate Change 2007: Mitigation. Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (Cambridge University Press, Cambridge; Retrieved June 26, 2007).
2. Yacobucci, B.D. & Womach, J. Fuel Ethanol: Background and Public Policy Issues. Report No. CRS RL33290. (Congressional Research Service 3, 2006).
3. Coyle, W. The Future of Biofuels (Economic Research Service, Washington, DC, 2007).
4. Keasling, J.D. & Chou, H. Nat. Biotechnol. 26, 298–299 (2008).
5. Atsumi, S., Hanai, T. & Liao, J.C. Nature 451, 86–89 (2008).