@article{
  author = {Soltanifar, Mehdi, SHarafi, Hamid, Zargar, Seyyed Mohammad, Homayounfar, Mehdi},
  title = {Supplier Ranking Using Data Envelopment Analysis and New Cross Efficiency Evaluation in the Presence of Undesirable Outputs},
  journal = {Journal of New Researches in Mathematics},
  year = {2021},
  volume = {7},
  number = {4},
  pages = {35-58},
  doi = {}
}