Author:
Cowen L. J.,Cowen R. H.,Woodall D. R.
Subject
Geometry and Topology,Discrete Mathematics and Combinatorics
Reference4 articles.
1. The existence of unavoidable sets of geographically good configurations
2. Graph Theory. Addison-Wesley, Reading, MA (1969).
3. and , The Appel-Haken proof of the four-color theorem. Selected Topics in Graph Theory, and , Eds. Academic, London (1978), pp. 83–101.
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