D. Im and  S. Choi and  H. Kwon and  S. H. Park and  J. H. Kwon,  Rotor Flow Analysis using Animplicit Harmonic Balance Method.   journal   = {International Journal of Aerospace and Mechanical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2011, vol. 55(7). 1221 - 1227
    [viewed 04 August 2020]. Available from: https://publications.waset.org/pdf/6158.