Bar <i>k</i>-Visibility Graphs: Bounds on the Number of Edges, Chromatic Number, and Thickness.

Alice M. Dean William Evans Ellen Gethner Joshua D. Laison Mohammad Ali Safari William T. Trotter Bar <i>k</i>-Visibility Graphs: Bounds on the Number of Edges, Chromatic Number, and Thickness. 73-82 2005 conf/gd/2005 Graph Drawing http://dx.doi.org/10.1007/11618058_7 db/conf/gd/gd2005.html#DeanEGLST05