5Finkenzeller, K. RFID Handbook Fundamentals and Applications in Contactless Smart Cards and Identification. Germany: HANSER Verlag, 2000 : 52 - 58.
6Xu Bao, Gang Wang. Random Sampling Algorithm in RFID Location System, The 3rd IEEE international Workshop on Electronic Design. Test & Applications,2006,16 (2) : 168 - 173.