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@article{DAN_1989_308_5_a4, author = {M. S. Nikol'skii}, title = {Approximation of convex-valued continuous multivalued mappings}, journal = {Doklady Akademii Nauk}, pages = {1047--1050}, publisher = {mathdoc}, volume = {308}, number = {5}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1989_308_5_a4/} }
M. S. Nikol'skii. Approximation of convex-valued continuous multivalued mappings. Doklady Akademii Nauk, Tome 308 (1989) no. 5, pp. 1047-1050. http://geodesic.mathdoc.fr/item/DAN_1989_308_5_a4/