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IEEE Communications Magazine > 2011 > 49 > 5 > 78 - 82
IEEE Transactions on Wireless Communications > 2011 > 10 > 3 > 745 - 750
IEEE Transactions on Wireless Communications > 2009 > 8 > 4 > 1773 - 1782
IEEE Journal on Selected Areas in Communications > 2009 > 27 > 2 > 217 - 225