Jesús A. De Loera Francisco Santos Fumihiko Takeuchi Extremal Properties for Dissections of Convex 3-Polytopes. 143-161 2001 14 SIAM J. Discrete Math. 2 http://epubs.siam.org/sam-bin/dbq/article/36623 db/journals/siamdm/siamdm14.html#LoeraST01