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IEEE Communications Letters > 2013 > 17 > 3 > 533 - 536
IEEE Transactions on Wireless Communications > 2010 > 9 > 6 > 1855 - 1860
IEEE Transactions on Wireless Communications > 2009 > 8 > 8 > 3961 - 3968
IEEE Transactions on Vehicular Technology > 2009 > 58 > 3 > 1269 - 1280