@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},
     year = {1989},
     number = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1989_8_a15/}
}