Appel, K.; Haken, W. A proof of the four color theorem. (English) Zbl 0339.05109 Discrete Math. 16, 179-180 (1976). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 ReviewCited in 13 Documents MSC: 05C15 Coloring of graphs and hypergraphs PDF BibTeX XML Cite \textit{K. Appel} and \textit{W. Haken}, Discrete Math. 16, 179--180 (1976; Zbl 0339.05109) Full Text: DOI OpenURL