1. Alternative Fuels Data Center (AFDC), 2015. Electric vehicle charging station locations. U.S. Department of Energy.
2. Alternative Fuels Data Center (AFDC), 2015. Federal and state laws and incentives. U.S. Department of Energy.
3. American Council for an Energy-Efficient Economy (ACEEE), 2015. State and local policy database.
4. Anair, D., Mahmassani, A., 2012. State of charge: Electric vehicles’ global warming emissions and fuel-cost savings across the United States.
5. Austin Energy, 2015. Plug-In Austin : Electric Vehicle Drivers. Available at: http://austinenergy.com/wps/portal/ae/programs/plug-in-austin/plug-in-austin/.