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IEEE Communications Letters > 2011 > 15 > 6 > 623 - 625
IEEE Transactions on Mobile Computing > 2008 > 7 > 3 > 358 - 371
IEEE Communications Letters > 2011 > 15 > 6 > 623 - 625
IEEE Transactions on Mobile Computing > 2008 > 7 > 3 > 358 - 371