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IEEE Communications Letters > 2013 > 17 > 11 > 2080 - 2083
IEEE Transactions on Communications > 2012 > 60 > 11 > 3461 - 3471
IEEE Transactions on Vehicular Technology > 2010 > 59 > 7 > 3668 - 3674
IEEE Transactions on Wireless Communications > 2008 > 7 > 1 > 118 - 127