WASET
    Ahmed M. Farag and  Wael F. Mohamed and  Atef A. Ata and  Burhamy M. Burhamy,  Numerical Method Based On Initial Value-Finite Differences for Free Vibration of Stepped Thickness Plates.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2013, vol. 73(1). 1 - 7
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/12368.