@article{litvinchev2001priori,
  title={A priori error bounds for the aggregation in the generalized transportation problem},
  author={Litvinchev, Igor S and Rangel, Socorro and Chacon, Oscar},
  journal={Journal of Computer and Systems Sciences International},
  volume={40},
  number={6},
  pages={923--929},
  year={2001},
  publisher={Springer},
  keywords = {pisis}
}

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