@article{10_4153_CJM_1968_142_0,
     author = {Sallee, G. T.},
     title = {Polytopes, {Valuations,} and the {Euler} {Relation}},
     journal = {Canadian journal of mathematics},
     pages = {1412--1424},
     year = {1968},
     volume = {20},
     number = {1},
     doi = {10.4153/CJM-1968-142-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-142-0/}
}