Ali M. Eltamaly and  A. I. Alolah and  R. Hamouda and  M. Y. Abdulghany,  A Novel Digital Implementation of AC Voltage Controller for Speed Control of Induction Motor.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2009, vol. 30(6). 678 - 683
    [viewed 23 January 2020]. Available from: https://publications.waset.org/pdf/13788.