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@article{DAN_1971_200_3_a8, author = {R. A. Polyak}, title = {On best convex {Cebysev} approximation}, journal = {Doklady Akademii Nauk}, pages = {538--540}, publisher = {mathdoc}, volume = {200}, number = {3}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1971_200_3_a8/} }
R. A. Polyak. On best convex Cebysev approximation. Doklady Akademii Nauk, Tome 200 (1971) no. 3, pp. 538-540. http://geodesic.mathdoc.fr/item/DAN_1971_200_3_a8/