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@article{ELMA_1982__37_141284, author = {Horst Bergmann}, title = {Ein {Planarit\"atskriterium} f\"ur endliche {Graphen.}}, journal = {Elemente der Mathematik}, pages = {49--54}, publisher = {mathdoc}, volume = {37}, year = {1982}, zbl = {0484.05032}, url = {http://geodesic.mathdoc.fr/item/ELMA_1982__37_141284/} }
Horst Bergmann. Ein Planaritätskriterium für endliche Graphen.. Elemente der Mathematik, Tome 37 (1982), pp. 49-54. http://geodesic.mathdoc.fr/item/ELMA_1982__37_141284/