@article{
  author = {Jahani Sayyad Noveiri, M., Kordrostami, S., Amirteimoori, A.R.},
  title = {Cost Efficiency of Closed–Loop Supply Chain in the Presence of Dual-Role and Undesirable Factors},
  journal = {Journal of New Researches in Mathematics},
  year = {2017},
  volume = {3},
  number = {1},
  pages = {5-16},
  doi = {}
}