WASET
    M. Brahim and  I. Bahri and  Y. Bernard,  H-Infinity and RST Position Controllers of Rotary Traveling Wave Ultrasonic Motor.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2017, vol. 122(2). 334 - 341
    [viewed 28 March 2024]. Available from: https://publications.waset.org/pdf/10006381.