Journal of Combinatorial Theory Series B · 2005 · 19 citations · 13 references
Geometric Group TheoryGraph TheoryAlgebraic Graph TheoryTopological Graph TheoryEducationDiscrete MathematicsExtremal Graph TheoryNonorientable Genus
13
Percy J. Heawood · Proceedings of the London Mathematical Society · 1949 · 224 citations
Philip Franklin · Journal of Mathematics and Physics · 1934 · 72 citations