El Kaak Rachid and  El Bikri Khalid and  Benamar Rhali,  Large Vibration Amplitude of Circular Functionally Graded Plates Resting on Pasternak Foundations.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2013, vol. 81(9). 1816 - 1820
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/16714.