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IEEE Communications Letters > 2016 > 20 > 8 > 1523 - 1526
IEEE Communications Letters > 2011 > 15 > 1 > 10 - 12
IEEE Transactions on Vehicular Technology > 2010 > 59 > 3 > 1497 - 1503
IEEE Communications Letters > 2007 > 11 > 12 > 958 - 960