M. Kidouche and  H. Habbi and  M. Zelmat and  S. Grouni,  The First Integral Approach in Stability Problem of Large Scale Nonlinear Dynamical Systems.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    November 2008, vol. 23(11). 777 - 782
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/15249.