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IEEE Communications Letters > 2012 > 16 > 4 > 442 - 445
IEEE Transactions on Wireless Communications > 2012 > 11 > 5 > 1881 - 1891
Proceedings of the IEEE > 2012 > 100 > 12 > 3172 - 3186
IEEE Transactions on Wireless Communications > 2012 > 11 > 6 > 2056 - 2064