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@article{CMH_1977__52_139697, author = {Larry Q. Eifler}, title = {Semi-continuity of the face-function for a convex set.}, journal = {Commentarii mathematici Helvetici}, pages = {325--328}, publisher = {mathdoc}, volume = {52}, year = {1977}, zbl = {0357.46001}, url = {http://geodesic.mathdoc.fr/item/CMH_1977__52_139697/} }
Larry Q. Eifler. Semi-continuity of the face-function for a convex set.. Commentarii mathematici Helvetici, Tome 52 (1977), pp. 325-328. http://geodesic.mathdoc.fr/item/CMH_1977__52_139697/