The rectilinear crossing number of K 10 is 62. Brodsky, Alex; Durocher, Stephane; Gethner, Ellen — 2001 The Electronic Journal of Combinatorics [electronic only]
Bar k -visibility graphs. Dean, Alice M.; Evans, William; Gethner, Ellen; Laison, Joshua D.; Safari, Mohammad Ali; Trotter, William T. — 2007 Journal of Graph Algorithms and Applications