STOC '01 Proceedings of the thirty-third annual ACM symposium on Theory of computing
Geometric Graphs with No Self-intersecting Path of Length Three
GD '02 Revised Papers from the 10th International Symposium on Graph Drawing
Improving the crossing lemma by finding more crossings in sparse graphs: [extended abstract]
SCG '04 Proceedings of the twentieth annual symposium on Computational geometry
Topological Graphs with No Large Grids
Graphs and Combinatorics
Note: On the maximum number of edges in quasi-planar graphs
Journal of Combinatorial Theory Series A
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Let G be a graph without loops or multiple edges drawn in the plane. It is shown that, for any k, if G has at least Ckn edges and n vertices, then it contains three sets of k edges, such that every edge in any of the sets crosses all edges in the other two sets. Furthermore, two of the three sets can be chosen such that all k edges in the set have a common vertex.