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IEEE Communications Letters > 2013 > 17 > 4 > 633 - 636
IEEE Transactions on Vehicular Technology > 2013 > 62 > 3 > 1267 - 1275
IEEE Communications Letters > 2012 > 16 > 4 > 439 - 441
IEEE Transactions on Broadcasting > 2011 > 57 > 2-1 > 231 - 245