1. ISO 14443. Identification Cards-Contactless Integrated Circuit Cards-Proximity cards. Intenational Organization for Standardization, Geneva. http://ww.iso.org
2. Hancke G. A Practical Relay Attack on ISO 14443 Proximity Cards. http://www.cl.cam.ac.uk/∼gh275/
3. Singelee D, Preneel B. Location Verification Using Secure Distance Bounding Protocols. 2nd IEEE International Conference on Mobile, Ad Hoc and Sensor Systems-MASS-2005, Washington.
4. Fishkin K, Roy S. Enhancing RFID Privacy via Antenna Energy Analysis. RFID Privacy Workshop, 2003.