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IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control > 2009 > 56 > 4 > 779 - 787
IEEE Sensors Journal > 2008 > 8 > 8 > 1422 - 1429
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control > 2009 > 56 > 4 > 779 - 787
IEEE Sensors Journal > 2008 > 8 > 8 > 1422 - 1429