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IT Professional > 2009 > 12 > 3 > 26 - 32
IEEE Communications Letters > 2008 > 12 > 3 > 216 - 218
IEEE Communications Magazine > 2008 > 46 > 7 > 56 - 63
IEEE Transactions on Vehicular Technology > 2007 > 56 > 5-1 > 2697 - 2712