The edge-density of 4-critical planar graphs (Q1813125)

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scientific article; zbMATH DE number 2500
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The edge-density of 4-critical planar graphs
scientific article; zbMATH DE number 2500

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    The edge-density of 4-critical planar graphs (English)
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    25 June 1992
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    edge-density
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    4-critical planar graphs
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