1. C. C. D. US EPA, “Greenhouse gas emissions: transportation sector emissions”.
2. DOT, “About Transportation & Climate Change: Transportation's Role in Climate Change: Overview – DOT Transportation and Climate Change Clearinghouse.” [Online]. Available: http://climate.dot.gov/about/transportations-role/overview.html. [Accessed 3 August 2015].
3. “Criteria air pollutants,” in Transportation energy data book: edition 33;Oak Ridge National Laboratory,2014
4. Environmental and energy implications of plug-in hybrid-electric vehicles;Stephan;Environ Sci Technol,2008
5. Electric vehicle battery technologies: from present state to future systems;Manzetti;Renew Sustain Energy Rev,2015