6Wolfgang D. Interoperable 5. 8GHz DSRC systems as basis for European wide ETC implementation [C]//European Microwave Conference, 1997 (1) : 139-145.
7Junko O, Yoshiro S, Katsuyoshi S. A study on op- eration of ETC (electronic toll collection)[C]//IEEE Conference on Intelligent Transportation System 1999:581-585.
8Poirier C C, McCollum D. RFID strategic implemen- tation and ROI: a practical roadmap to success[M]. New York..J. Ross Publishing, 2006.
