"Planar graphs with square or cube root are four-colorable."

S. Ramachandran (1978)

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DOI: 10.1016/0095-8956(78)90055-2

access: open

type: Journal Article

metadata version: 2024-06-07

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  - https://dblp.org/rec/journals/jct/Ramachandran78
S. Ramachandran:
Planar graphs with square or cube root are four-colorable. J. Comb. Theory B 24(3): 362-364 (1978)

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