%0 Journal Article %A Sallee, G. T. %T Polytopes, Valuations, and the Euler Relation %J Canadian journal of mathematics %D 1968 %P 1412-1424 %V 20 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-142-0/ %R 10.4153/CJM-1968-142-0 %F 10_4153_CJM_1968_142_0