@article{
  author = {Ebrahimpoor, Davood},
  title = {Comparative study of the social ideas of utopia
in Plato, Abonasr Farabi and Karl Marx.},
  journal = {Sociological studies},
  year = {2009},
  volume = {2},
  number = {3},
  pages = {91-110},
  doi = {}
}