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@article{INTF_1987_14_a1, author = {V. M. Tikhomirov}, title = {Approximation theory}, journal = {Itogi Nauki i Tekhniki. Seriya Sovremennye Problemy Matematiki. Fundamental'nye Napravleniya }, pages = {103--260}, publisher = {mathdoc}, volume = {14}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/INTF_1987_14_a1/} }
V. M. Tikhomirov. Approximation theory. Itogi Nauki i Tekhniki. Seriya Sovremennye Problemy Matematiki. Fundamental'nye Napravleniya , Analysis – 2, Tome 14 (1987), pp. 103-260. http://geodesic.mathdoc.fr/item/INTF_1987_14_a1/