@article{
  author = {Joghataie, Mahboobeh, Hosseinzadeh lotfi, Farhad, Allahviranloo, ‪Tofigh},
  title = {Efficiency and Return to Scale of Two-Stage network in Data Envelopment Analysis Using Additive Model},
  journal = {International Journal of Data Envelopment Analysis},
  year = {2020},
  volume = {8},
  number = {2},
  pages = {69-78},
  doi = {}
}