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 19 September 2024]. Available from: https://publications.waset.org/pdf/15761.