Meng Hu and  Lili Wang,  Application of He-s Amplitude Frequency Formulation for a Nonlinear Oscillator with Fractional Potential.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    August 2012, vol. 68(8). 1213 - 1215
    [viewed 18 April 2024]. Available from: https://publications.waset.org/pdf/14017.