1. 20 in 10 Fact Sheet 〈http://www.energy.gov/media/20in10FactSheet.pdf〉.
2. AFDC, 2011. Alternative Fuels and Advanced Vehicles Data Center, Federal & State Incentives, Reference H.R. 4853, 2010, Section 711, and 26 US Code 30C and 38B. 〈http://www.afdc.energy.gov/afdc/laws/law/US/351〉.
3. American Recovery and Reinvestment Act of 2009 〈http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=111_cong_bills&docid=f:h1enr.pdf〉.
4. Andress, D., 2010. HEV breakout—2010FEguide-for DOE-rel dates before 10-16-09-no-sales10-8-09public.xls.
5. Reducing GHG Emissions in the United States' Transportation Sector;Andress;Energy for Sustainable Development,2011