@article{
  author = {Sharifi, M., Tohidi, GH., Daneshian, B., Modarres khiyabani, F.},
  title = {A new non oriented models for calculating the efficiency of decision-making units in the presence of flexible variables},
  journal = {Journal of New Researches in Mathematics},
  year = {2018},
  volume = {4},
  number = {3},
  pages = {19-30},
  doi = {}
}