WASET
    Desmond Adair and  Kairat Ismailov and  Martin Jaeger,  Vibration of a Beam on an Elastic Foundation Using the Variational Iteration Method.   journal   = {International Journal of Aerospace and Mechanical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2018, vol. 141(9). 914 - 919
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/10009544.