Nasim Ullah and  Shaoping Wang,  Improved Torque Control of Electrical Load Simulator with Parameters and State Estimation.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2011, vol. 60(12). 1647 - 1653
    [viewed 12 July 2020]. Available from: https://publications.waset.org/pdf/3933.