@article{
  author = {پورزمانی, زهرا, حیدرپور, فرزانه, محمدی, محمدرضا},
  title = {},
  journal = {Financial Engineering and Portfolio Management},
  year = {2011},
  volume = {2},
  number = {7},
  pages = {215-229},
  doi = {}
}