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IEEE Communications Magazine > 2009 > 47 > 6 > 142 - 148
IEEE Communications Magazine > 2009 > 47 > 6 > 10 - 12
IT Professional > 2009 > 12 > 3 > 26 - 32
IEEE Journal on Selected Areas in Communications > 2008 > 26 > 7 > 1218 - 1225
IEEE Communications Magazine > 2007 > 45 > 12 > 76 - 81