1. World Vehicle Population Tops 1 Billion Units
http://wardsauto.com/news-analysis/world-vehicle-population-tops-1-billion-units
2. Number Of Cars Worldwide Surpasses 1 Billion; Can The World Handle This Many Wheels?
http://www.huffingtonpost.ca/2011/08/23/car-population_n_934291.html
3. MobileBurn.com. What Is Haptic Feedback?
http://www.mobileburn.com/definition.jsp?term=haptic+feedback
4. Supporting presence in collaborative environments by haptic force feedback
5. The Personal Adaptive In-Car HMI: Integration of External Applications for Personalized Use;Garzon,2012