@misc{10_4153_CMB_1997_056_4,
     title = {A {Short} {Proof} of {Euler{\textquoteright}s} {Relation} for {Convex} {Polytopes}},
     journal = {Canadian mathematical bulletin},
     pages = {471--474},
     year = {1997},
     volume = {40},
     number = {4},
     doi = {10.4153/CMB-1997-056-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1997-056-4/}
}