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IEEE Communications Letters > 2009 > 13 > 4 > 268 - 270
IEEE Transactions on Mobile Computing > 2007 > 6 > 12 > 1329 - 1342
IEEE Communications Letters > 2009 > 13 > 4 > 268 - 270
IEEE Transactions on Mobile Computing > 2007 > 6 > 12 > 1329 - 1342