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IEEE Communications Letters > 2011 > 15 > 3 > 302 - 304
IEEE Vehicular Technology Magazine > 2010 > 5 > 1 > 85 - 90
IEEE Communications Letters > 2011 > 15 > 3 > 302 - 304
IEEE Vehicular Technology Magazine > 2010 > 5 > 1 > 85 - 90