Watching systems in graphs: An extension of identifying codes

@article{Auger2013WatchingSI,
  title={Watching systems in graphs: An extension of identifying codes},
  author={David Auger and Ir{\`e}ne Charon and Olivier Hudry and Antoine Lobstein},
  journal={Discret. Appl. Math.},
  year={2013},
  volume={161},
  pages={1674-1685}
}
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Combinatorial Algorithms
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TLDR
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