@article{roy1967nombre,
  title={Nombre chromatique et plus longs chemins d'un graphe},
  author={Roy, Bernard},
  journal={Revue fran{\c{c}}aise d'informatique et de recherche op{\'e}rationnelle},
  volume={1},
  number={5},
  pages={129--132},
  year={1967}
}

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