On the orientable genus of graphs with bounded nonorientable genus
A conjecture of \textit{N. Robertson} and \textit{R. Thomas} [J. Graph Theory 15, No. 4, 407-419 (1991; Zbl 0735.05031)] on the orientable genus of graphs with a given nonorientable embedding is disproved.
scientific article; zbMATH DE number 1121500
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