Mohamed Essahafi and  Mustapha Ait Lafkih,  Evaluation Performance of PID, LQR, Pole Placement Controllers for Heat Exchanger.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2014, vol. 90(6). 946 - 950
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/9998761.