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@article{IVM_1988_4_a15, author = {Yu. A. Farkov}, title = {Widths of classes of analytic functions with bounded derivatives}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {84--86}, publisher = {mathdoc}, number = {4}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1988_4_a15/} }
Yu. A. Farkov. Widths of classes of analytic functions with bounded derivatives. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (1988), pp. 84-86. http://geodesic.mathdoc.fr/item/IVM_1988_4_a15/