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IEEE Communications Surveys & Tutorials > 2011 > 13 > 2 > 258 - 273
IEEE Transactions on Wireless Communications > 2010 > 9 > 10 > 3064 - 3071
IEEE Communications Surveys & Tutorials > 2011 > 13 > 2 > 258 - 273
IEEE Transactions on Wireless Communications > 2010 > 9 > 10 > 3064 - 3071