A strengthening of the Kuratowski planarity criterion for 3-connected graphs
It is proved that each 3-connected non-planar graph distinct from \(K_ 5\) contains a special subdivision of \(K_{3,3}\) with three pairwise non- adjacent non-subdivided edges (i.e., a cycle with three pairwise ''interwoven'' chords).
scientific article; zbMATH DE number 3867364