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IEEE Sensors Journal > 2008 > 8 > 8 > 1478 - 1485
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control > 2005 > 52 > 3 > 480 - 486
IEEE Sensors Journal > 2008 > 8 > 8 > 1478 - 1485
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control > 2005 > 52 > 3 > 480 - 486