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IEEE Sensors Journal > 2008 > 8 > 9 > 1578 - 1585
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control > 2004 > 51 > 11 > 1404 - 1411
IEEE Sensors Journal > 2008 > 8 > 9 > 1578 - 1585
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control > 2004 > 51 > 11 > 1404 - 1411