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2. U.S. Department of Transportation, National Highway Traffic and Safety Administration (NHTSA). Summary of fuel economy performance, (Public Version). June 26, 2014. Washington, DC: DOT; 2014.
3. Sivak M. Sales-weighted unadjusted CAFE performance for October 2007 through July 2014. Ann Arbor: University of Michigan Transportation Research Institute; 2014. .
4. U.S. Environmental Protection Agency and U.S. Department of Transportation – National Highway Traffic Safety Administration. Draft joint technical support document, proposed rulemaking to establish light-duty vehicle greenhouse gas emission standards and corporate average fuel economy standards. Washington, DC: EPA and NHTSA; 2009.
5. U.S. Department of Energy, Energy Information Administration. The National Energy Modeling System: An Overview 2009. US DOE/EIA-0581. Washington, DC: DOE; 2009.