@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},
     year = {1988},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1988_4_a15/}
}