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1
Appel K, Haken W, Koch J. Every planar map is four colorable. Part II: Reducibility. ACTA ACUST UNITED AC 1977. [DOI: 10.1215/ijm/1256049012] [Citation(s) in RCA: 341] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
2
Appel K, Haken W. Every planar map is four colorable. Part I: Discharging. ACTA ACUST UNITED AC 1977. [DOI: 10.1215/ijm/1256049011] [Citation(s) in RCA: 494] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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