1. ACEA, 2009. Trends in new car characteristics. ACEA website 〈http://www.acea.be/index.php/news/news_detail/trends_in_new_car_characteristics/〉.
2. International comparison of policies to reduce greenhouse gas emissions from passenger vehicles;An,2007
3. Commission, E., 2008. Communication from the Commission to the Council and the European Parliament: monitoring the CO2 emissions from cars in the EU: data for the years 2005, 2006 and 2007. COM(2009) 9 final, Brussels, 27.1.2009. 〈http://ec.europa.eu/environment/air/transport/co2/co2_monitoring.htm〉.
4. Powering or de-powering future vehicles to reach low carbon outcomes: the long term view 1930–2020;Cousins;Journal of Cleaner Production,2007
5. Vehicle Ownership and Income Growth, Worldwide: 1960–2030;Dargay,2007