Leonid Khachiyan Endre Boros Konrad Borys Khaled M. Elbassioni Vladimir Gurvich Generating All Vertices of a Polyhedron Is Hard. 174-190 2008 39 Discrete & Computational Geometry 1-3 http://dx.doi.org/10.1007/s00454-008-9050-5 db/journals/dcg/dcg39.html#KhachiyanBBEG08