"The edge-density of 4-critical planar graphs."

Branko Grünbaum (1988)

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DOI: 10.1007/BF02122562

access: closed

type: Journal Article

metadata version: 2020-07-22

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Branko Grünbaum:
The edge-density of 4-critical planar graphs. Comb. 8(1): 137-139 (1988)

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