Localization of the optimal solution and a posteriori bounds for aggregation. Litvinchev, I. S & Rangel, S. Computers & operations research, 26(10):967--988, Pergamon, 1999.
bibtex   
@article{litvinchev1999localization,
  title={Localization of the optimal solution and a posteriori bounds for aggregation},
  author={Litvinchev, Igor S and Rangel, Socorro},
  journal={Computers \& operations research},
  volume={26},
  number={10},
  pages={967--988},
  year={1999},
  publisher={Pergamon},
  keywords = {pisis}
}

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