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IEEE Communications Letters > 2011 > 15 > 4 > 401 - 403
IEEE Transactions on Mobile Computing > 2010 > 9 > 12 > 1732 - 1748
IEEE Communications Letters > 2011 > 15 > 4 > 401 - 403
IEEE Transactions on Mobile Computing > 2010 > 9 > 12 > 1732 - 1748