@article{
  author = {Shiri Daryani, Zahra, Razavyan, Shabnam},
  title = {Input Estimation in Two-Stage Systems with Undesirable Outputs Based on Cost Efficiency},
  journal = {International Journal of Data Envelopment Analysis},
  year = {2021},
  volume = {9},
  number = {4},
  pages = {89-102},
  doi = {10.30495/ijdea.2022.68962.1179}
}