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Another proof of the four colour theorem. I. (English) Zbl 0506.05028
Numerical mathematics and computing, Proc. 7th Manitoba Conf., Winnipeg/Can. 1977, Congr. Numerantium 20, 3-72 (1978).

MSC:
05C15 Coloring of graphs and hypergraphs
05-02 Research exposition (monographs, survey articles) pertaining to combinatorics