1. A 1.6-mm, metal tube ultrasonic motor
2. Fujii, A., 2005. Proceedings JTTAS Meeting on December 2, Tokyo.
3. Temperature‐compensated PbTiO3ceramics for surface acoustic wave applications
4. Piezoelectricity;Ito,1999
5. Jaffe, B., 1955. Piezoelectric Transducers Using Lead Titanate and Lead Zirconate. US Patent 2,708,244, May.