Pierre Kenfack,  An Approach of the Inverter Voltage Used for the Linear Machine with Multi Air-Gap Structure.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2018, vol. 143(11). 783 - 787
    [viewed 21 February 2020]. Available from: https://publications.waset.org/pdf/10009738.