@article{
  author = {Iranzadeh, Soleyman, Bagheri, Davood, Azarkasb, Asgar},
  title = {Presenting a Fuzzy Tree Appraisal Model to Investigate the Systems of the Performance Appraisal of the Employees and to Select the Right Appraisal System for East Azerbaijan Branches of Islamic Azad University},
  journal = {The Journal of Productivity Management},
  year = {2011},
  volume = {5},
  number = {2},
  pages = {53-90},
  doi = {}
}