@article{
  author = {Farhatnia, F, Golshah, A},
  title = {Buckling Analysis of Polar Orthotropic Circular and Annular Plates of Uniform and Linearly Varying Thickness with Different Edge Conditions},
  journal = {Journal of Solid Mechanics},
  year = {2010},
  volume = {2},
  number = {2},
  pages = {156-167},
  doi = {}
}