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IEEE Communications Surveys & Tutorials > 2014 > 16 > 2 > 713 - 728
IEEE Transactions on Vehicular Technology > 2010 > 59 > 6 > 2852 - 2860
IEEE Communications Surveys & Tutorials > 2014 > 16 > 2 > 713 - 728
IEEE Transactions on Vehicular Technology > 2010 > 59 > 6 > 2852 - 2860