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"Counterexamples to Grötzsch-Sachs-Koester's conjecture."
Andrey A. Dobrynin, Leonid S. Melnikov (2006)
- Andrey A. Dobrynin, Leonid S. Melnikov:
Counterexamples to Grötzsch-Sachs-Koester's conjecture. Discret. Math. 306(6): 591-594 (2006)
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