1. Zhao D.: Carsharing: a sustainable and innovative personal transport solution with great potential and huge opportunities, Frost and Sullivan, 28 January. http://www.frost.com/sublib/display-market-insight.do?id = 190795176 (2010) (Accessed 23 April 2015).
2. Shaheen SA, Cohen AP. Innovative mobility carsharing outlook: carsharing market overview, trends, and analysis. Berkeley: Transportation Sustainability Research Center, University of California, Summer; 2015.
3. Shaheen, S.: Mobility and the sharing economy: past, present, and future keynote speech at first International Symposium on the Sharing Economy, Utrecht, Netherlands; 2015.
4. Economist. The future of the car: clean, safe and it drives itself, 20 April. www.economist.com/news/leaders/21576384-cars-have-already-changed-way-we-live-they-are-likely-do-so-again-clean-safe-and-it/print (2013). Accessed 24 April 2013.
5. Forrest A. and M. Konca.: Autonomous Cars and Society, Worcester Polytechnic Institute, 1 May. http://www.wpi.edu/Pubs/E-project/Available/E-project-043007-205701/unrestricted/IQPOVP06B1.pdf (2007) (Accessed 20 October 2013).