凱尼斯·阿佩爾
文章
- Every planar map is four colorable. Part I. Discharging. Illinois Journal of Mathematics Bd.21, 1977
- Every planar map is four colorable, Bulletin AMS Bd.82, 1976, S.711
- Every Planar Map is Four Colorable, Contemporary Mathematics, Bd. 98, American Mathematical Society, 1989
- The Solution of the Four-Color-Map Problem, Scientific American, Bd.237, Nr. 4, S. 108-121 (1977)
参考资料
- . legacy.com. 2013-04-21 [2013-04-28]. (原始内容存档于2013-12-24) (英语).
外部链接
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