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A 4-Color Theorem for Toroidal Graphs - MaRDI portal

A 4-Color Theorem for Toroidal Graphs (Q5623703)

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scientific article; zbMATH DE number 3348126
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A 4-Color Theorem for Toroidal Graphs
scientific article; zbMATH DE number 3348126

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    A 4-Color Theorem for Toroidal Graphs (English)
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    1972
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