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IEEE Sensors Journal > 2010 > 10 > 8 > 1291 - 1296
2009 IEEE International Ultrasonics Symposium > 1691 - 1694
Electronics Letters > 2008 > 44 > 17 > 1034 - 1035
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control > 2007 > 54 > 7 > 1486 - 1491