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@article{IVM_1989_8_a15, author = {R. M. Rzaev}, title = {Local theorems for the approximation of periodic functions}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {85--88}, publisher = {mathdoc}, number = {8}, year = {1989}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1989_8_a15/} }
R. M. Rzaev. Local theorems for the approximation of periodic functions. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 8 (1989), pp. 85-88. http://geodesic.mathdoc.fr/item/IVM_1989_8_a15/