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"Three-coloring triangle-free graphs on surfaces II. 4-critical graphs in a ..."
Zdenek Dvorák, Daniel Král', Robin Thomas (2018)
- Zdenek Dvorák, Daniel Král', Robin Thomas:
Three-coloring triangle-free graphs on surfaces II. 4-critical graphs in a disk. J. Comb. Theory, Ser. B 132: 1-46 (2018)
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