On stabbing triangles by lines in 3-space
Commentationes Mathematicae Universitatis Carolinae, Tome 36 (1995) no. 1, pp. 109-113.

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We give an example of a set $P$ of $3n$ points in $\Bbb R 3$ such that, for any partition of $P$ into triples, there exists a line stabbing $\Omega(\sqrt n)$ of the triangles determined by the triples.
Classification : 52B55, 52C99, 68U05
Keywords: combinatorial geometry; computational geometry; crossing number
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Aronov, Boris; Matoušek, Jiří. On stabbing triangles by lines in 3-space. Commentationes Mathematicae Universitatis Carolinae, Tome 36 (1995) no. 1, pp. 109-113. http://geodesic.mathdoc.fr/item/CMUC_1995__36_1_a12/