Tooraj Hakim Elahi and  Abdolamir Nekoubin,  Optimal Controller Design for Linear Magnetic Levitation Rail System.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2011, vol. 58(10). 1139 - 1143
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/13590.