WASET
    R. Farkh and  K. Laabidi and  M. Ksouri,  PI Control for Second Order Delay System with Tuning Parameter Optimization.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2009, vol. 27(3). 745 - 751
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/12133.