@Book{breiman1984,
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  year={1984},
  publisher={CRC press}
}

@Misc{deprins1984,
  title={Measuring labor efficiency in post offices, The Performance of Public Enterprises: Concepts and Measurements, M. Marchand, P. Pestieau and H. Tulkens},
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  year={1984},
  publisher={Amsterdam, North (Holland, 243 (267}
}

@article{esteve2020,
  title={Efficiency analysis trees: A new methodology for estimating production frontiers through decision trees},
  author={Esteve, Miriam and Aparicio, Juan and Rabasa, Alejandro and Rodriguez-Sala, Jesus J},
  journal={Expert Systems with Applications},
  volume={162},
  pages={113783},
  year={2020},
  publisher={Elsevier}
}