A. Abl,S. Rass,P. Schartner,P. Horster: A method for detecting a speed violation of a vehicle. European patent specification EP 2 648 170 B1,
US patent number US 8,964,984 B2, patent holder: Kapsch TrafficCom.
S. Rass,P. Schartner,P. Horster, A. Abl:Privacy-Preserving Speed-Limit Enforcement. International Journal of Traffic and Logistics Engineering, Vol. 2, No. 1, Engineering and Technology Publishing, ISSN 2301-3680, March 2014, pp. 26-33.