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@article{TM_1975_138_a1, author = {V. V. Arestov}, title = {Approximation of linear operators, and related extremal problems}, journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova}, pages = {29--42}, publisher = {mathdoc}, volume = {138}, year = {1975}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TM_1975_138_a1/} }
V. V. Arestov. Approximation of linear operators, and related extremal problems. Trudy Matematicheskogo Instituta imeni V.A. Steklova, Approximation of functions and operators, Tome 138 (1975), pp. 29-42. http://geodesic.mathdoc.fr/item/TM_1975_138_a1/