@article{
  author = {Iranzadeh, Soleyman, Norouzi, Davood, Babaei Heravi, Sadegh},
  title = {A Survey on Employees Performance Appraisal Systems by Using the Fuzzy Tree Model},
  journal = { Journal of Strategic Management in Industrial Systems},
  year = {2011},
  volume = {6},
  number = {17},
  pages = {115-132},
  doi = {}
}