The map-coloring of unorientable surfaces
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Publication:2652973
DOI10.1215/S0012-7094-43-01027-0zbMath0060.41602OpenAlexW2028736704MaRDI QIDQ2652973
Publication date: 1943
Published in: Duke Mathematical Journal (Search for Journal in Brave)
Full work available at URL: https://doi.org/10.1215/s0012-7094-43-01027-0
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