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"Labeling trees with a condition at distance two."
Tiziana Calamoneri, Rossella Petreschi, Andrzej Pelc (2003)
- Tiziana Calamoneri, Rossella Petreschi, Andrzej Pelc:
Labeling trees with a condition at distance two. Electron. Notes Discret. Math. 15: 55-58 (2003)
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