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IEEE Transactions on Communications > 2010 > 58 > 3 > 851 - 859
IEEE Communications Surveys & Tutorials > 1999 > 2 > 1 > 2 - 18
IEEE Transactions on Communications > 2010 > 58 > 3 > 851 - 859
IEEE Communications Surveys & Tutorials > 1999 > 2 > 1 > 2 - 18