1. Arar, J., Southgate, D., 2007. A model to evaluate CO2 emission reduction strategies in the US. The Ohio State University. Ph. D. Dissertation, 2007. Available at: http://www.ohiolink.edu/etd/view.cgi?acc_num=osu1186020342.
2. California, 2006. Assembly Bill AB 32, available at http://www.arb.ca.gov/cc/docs/ab32text.pdf.
3. Bioenergy, global warming, and environmental impacts;Demirbas;Energy Sources,2004
4. EIA renewable portfolio standards and state mandates by state, 2007. Available at http://www.eia.doe.gov/cneaf/solar.renewables/page/trends/table28.html.
5. Energy Information Administration, 2006a. Fuel and energy source codes and emission coefficients. Available at: http://www.eia.doe.gov/oiaf/1605/coefficients.html.