@article{banker1984,
  title={Some Models for Estimating Technical and Scale Inefficiencies in Data Envelopment Analysis},
  author={Rajiv D. Banker and A. Charnes and W. W. Cooper},
  year={1984},
  journal={Management Science},
  doi={10.1287/mnsc.30.9.1078},
  url={https://doi.org/10.1287/mnsc.30.9.1078}
}