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Books by Gerhard Ringel

Combinatorial analysis · Graph theory

Topics in combinatorics and graph theory

Gerhard Ringel

1990

Map color theorem

Map-coloring problem · Graphes, Théorie des

Map color theorem

Gerhard Ringel

1974

Four-color problem · Topology

Färbungsprobleme auf Flächen und Graphen

Gerhard Ringel

1959

Questioning

Situationsbewältigung durch Fragen

Erwin Ringel

1977

Topics in Combinatorics and Graph Theory

Gerhard Ringel

1992