1. (1) Tomikawa, Y., Takano, T. and Umeda, H., “Thin Rotary and Linear Ultrasonic Motors Using a Double-mode Piezoelectric Vibrator of the First Longitudinal and Second Bending Modes”, Japanese Journal of Applied Physics, Vol. 31, No. 9B (1992), pp. 3073-3076.
2. (2) Zumeris, J., Ceramic Motor, U. S. Patent 5453653 (1993).
3. (3) Funakubo, T., Tomikawa, Y., “Characteristics of 10 mm Multilayer L1-F2 Mode Vibrator and Application to a Linear Motor”, Japanese Journal of Applied Physics, Vol. 42, No. 5B (2003), pp. 3002-3006.
4. (4) Saigoh, H., Kawasaki, M., Maruko, N. and Kanayama, K., “Multilayer Piezoelectric Motor Using the First Longitudinal and the Second Bending Vibrations”, Japanese Journal of Applied Physics, Vol. 34, No. 5B (1995), pp. 2760-2764.
5. (5) 飯野朗弘,渡辺聖士,篠原陽子,"積層圧電振動子を用いた小型超音波リニヤアクチュエータの開発",精密工学会学術講演会講演論文集,Vol. 2003A (2003), pp. 780-780.