@article{
  author = {Eskandari Jam, Jafar, Nikjoo, Mohamad Ali},
  title = {Optimization of the base frequency of cylindrical stiffened composite shells with internal fluid},
  journal = {Journal of Mechanical Engineering and Vibration},
  year = {2011},
  volume = {2},
  number = {1},
  pages = {41-55},
  doi = {}
}