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IEEE Communications Surveys & Tutorials > 2014 > 16 > 3 > 1266 - 1293
IEEE Communications Letters > 2010 > 14 > 7 > 676 - 678
IEEE Communications Surveys & Tutorials > 2014 > 16 > 3 > 1266 - 1293
IEEE Communications Letters > 2010 > 14 > 7 > 676 - 678