1. AFDC (Alternative Fuel Data Center) (2014) Home page. Energy efficiency & renewable energy, US Department of Energy. http://www.afdc.energy.gov/ . Accessed 18 Feb 2014
2. AID (Automotive Industry Data) Newsletter (2014) EV car sales in Western Europe. Schmidt’s Auto Publications, 2011-January 2014. http://www.eagleaid.com . Accessed 18 Feb 2014
3. AMA (Japan Automobile Manufacturers Association) (2009) Japanese government incentives for the purchase of environmentally friendly vehicles (fact sheet). https://cleanenergysolutions.org/content/fact-sheet-japanese-government-incentives-purchase-environmentally-friendly-vehicles . Accessed 18 Feb 2014
4. Argonne (Argonne National Laboratory) (2014) Light duty electric drive vehicles monthly sales updates. http://www.transportation.anl.gov/technology_analysis/edrive_vehicle_monthly_sales.html . Accessed 18 Feb 2014
5. Beijing.gov.cn (2013) Beijing interim regulation provisions for passenger cars. http://zhengwu.beijing.gov.cn/gzdt/gggs/t1332605.htm . Accessed 18 Feb 2014