Quanlu, L. ., Miaoxia, X. ., Xiaojuan, L. ., Shujuan, H. ., & Yuan, L. . Multipurpose piezoelectrical ceramic materials and high performance transducers are used for the ultrasonic medicine. Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference, 2005, 2256-9. https://doi.org/10.1109/IEMBS.2005.1616913 (Original work published 2005)