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IEEE Systems Journal > 2010 > 4 > 4 > 432 - 439
IEEE INFOCOM 2009 > 1098 - 1106
IEEE Transactions on Vehicular Technology > 2009 > 58 > 8 > 4587 - 4597
IEEE Communications Surveys & Tutorials > 2009 > 11 > 2 > 74 - 86
IEEE Communications Magazine > 2008 > 46 > 10 > 154 - 161