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IEEE Communications Letters > 2010 > 14 > 3 > 257 - 259
IEEE Transactions on Wireless Communications > 2010 > 9 > 3 > 1063 - 1073
IEEE Transactions on Communications > 2010 > 58 > 4 > 1129 - 1141
IEEE EUROCON 2009 > 1616 - 1623