@article{RO_2021__55_3_1825_0,
     author = {Shahbazifar, Mohammad Sajjad and Kazemi Matin, Reza and Khounsiavash, Mohsen and Koushki, Fereshteh},
     title = {Group ranking of two-stage production units in network data envelopment analysis},
     journal = {RAIRO. Operations Research},
     pages = {1825--1840},
     year = {2021},
     publisher = {EDP-Sciences},
     volume = {55},
     number = {3},
     doi = {10.1051/ro/2021082},
     language = {en},
     url = {https://www.numdam.org/articles/10.1051/ro/2021082/}
}