Esther Ezra Micha Sharir A Single Cell in an Arrangement of Convex Polyhedra in \Bbb <i>R</i><sup>3</sup>. 21-41 2007 37 Discrete & Computational Geometry 1 http://dx.doi.org/10.1007/s00454-006-1272-9 db/journals/dcg/dcg37.html#EzraS07