Solution of the Heawood map-coloring problem—case 11
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Publication:5572117
DOI10.1016/S0021-9800(69)80008-6zbMath0182.26502MaRDI QIDQ5572117
Gerhard Ringel, J. W. T. Youngs
Publication date: 1969
Published in: Journal of Combinatorial Theory (Search for Journal in Brave)
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