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IEEE Communications Magazine > 2010 > 48 > 2 > 102 - 109
IEEE Journal on Selected Areas in Communications > 2009 > 27 > 2 > 226 - 234
IEEE Communications Magazine > 2010 > 48 > 2 > 102 - 109
IEEE Journal on Selected Areas in Communications > 2009 > 27 > 2 > 226 - 234