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IEEE Transactions on Vehicular Technology > 2009 > 58 > 1 > 367 - 380
IEEE Transactions on Mobile Computing > 2009 > 8 > 12 > 1690 - 1704
IEEE Transactions on Biomedical Circuits and Systems > 2008 > 2 > 4 > 251 - 259
IEEE Systems Journal > 2007 > 1 > 2 > 145 - 159