Six-Rings in Minimal Five-Color Maps

DOI10.2307/2371861zbMath0033.40304OpenAlexW2320469868MaRDI QIDQ5791075

Arthur Bernhart

Publication date: 1947

Published in: American Journal of Mathematics (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.2307/2371861

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