Friedrich Eisenbrand Nicolai Hähnle Alexander A. Razborov Thomas Rothvoß Diameter of Polyhedra: Limits of Abstraction. 786-794 2010 35 Math. Oper. Res. 4 http://dx.doi.org/10.1287/moor.1100.0470 db/journals/mor/mor35.html#EisenbrandHRR10