WASET
    A. Bennassar and  A. Abbou and  M. Akherraz and  M. Barara,  Sensorless Backstepping Control Using an Adaptive Luenberger Observer with Three Levels NPC Inverter.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2013, vol. 80(8). 1171 - 1177
    [viewed 29 March 2024]. Available from: https://publications.waset.org/pdf/17400.