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Submitted on: 22 March 2002.
Revised on: 13 July 2002.
Accepted on: 31 August 2002.
___________________IEEE Open Journal of Vehicular Technology
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Submitted on: 12 March 2002.
Revised on: 02 June 2002.
Accepted on: 05 July 2002.
___________________IEEE Open Journal of Vehicular Technology
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