WASET
    Norsinnira Zainul Azlan and  Hiroshi Yamaura,  Adaptive Impedance Control for Unknown Time-Varying Environment Position and Stiffness.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2013, vol. 74(2). 283 - 289
    [viewed 19 September 2024]. Available from: https://publications.waset.org/pdf/535.