6REN Z G, GAO Y B. Design of electronic toll collection system in expressway based on RFID [C]// Proceedings of 2009 International Conference on Environmental Science and Information Application Technology. New York. IEEE Computer Society, 2009: 779-782.
8XIAO Z H, GUAN Z Q, ZHENG Z H. The research and de- velopment of the highway' s electronic toll collection system [C]// Proceedings of the 1st International Workshop on Knowledge Discovery and Data Mining. New York: IEEE Com- puter Society, 2007: 359-362.
