@article{CMH_1964__39_139286,
     author = {V. Klee and H.G., Gr\"unbaum, B. Eggleston},
     title = {Some {Semicontinuity} {Theorems} for {Convex} {Polytopes} and {Cell-complexes.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {165--188},
     publisher = {mathdoc},
     volume = {39},
     year = {1964},
     zbl = {0137.41802},
     url = {http://geodesic.mathdoc.fr/item/CMH_1964__39_139286/}
}