WASET
    J. H. Park and  S. C. Jeong and  J. H. Koo and  H. Y. Jung and  S. M. Lee,  Integral Tracking Control for a Piezoelectric Actuator System.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2012, vol. 63(3). 314 - 317
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/12253.