WASET
    A. Izadbakhsh and  M. M. Fateh,  A Model-Free Robust Control Approach for Robot Manipulator.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2007, vol. 5(5). 757 - 759
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/10618.