WASET
    A.R.Tahmasebi Birgani and  M.Hosseinjani Zamenjani and  M.R.Isvandzibaei,  Vibration of Functionally Graded Cylindrical Shells under Free-Free Boundary Conditions.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2011, vol. 50(2). 326 - 330
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/15761.