@article{
  author = {Davar, A., Khalili, S. Mohammad Reza, Hadavinia, H.},
  title = {Free Vibrations of Functionally Graded Circular Cylindrical Shells under Internal Pressure},
  journal = {International Journal of Advanced Design and Manufacturing Technology},
  year = {2013},
  volume = {6},
  number = {4},
  pages = {0-0},
  doi = {}
}