1. S.-h. An, B.-H. Lee, and D.-R. Shin, "A survey of intelligent transportation systems," in 2011 Third International Conference on Computational Intelligence, Communication Systems and Networks, 2011, pp. 332–337: IEEE.
2. European Committee for Standardization. Available: https://www.cen.eu/Pages/default.aspx
3. International Organization for Standardization. Available: https://www.iso.org/home.html
4. The European Telecommunications Standards Institute. Available: https://www.etsi.org/
5. International Deployment of Cooperative Intelligent Transportation Systems− Bilateral Efforts of the European Commission and United States Department of Transportation;W. Höfs,2012