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IEEE Communications Letters > 2011 > 15 > 2 > 181 - 183
IEEE Communications Letters > 2011 > 15 > 6 > 626 - 628
IEEE Transactions on Consumer Electronics > 2010 > 56 > 2 > 458 - 462
IEEE Transactions on Vehicular Technology > 2010 > 59 > 3 > 1511 - 1517