@article{IVM_2019_1_a1,
     author = {H. H. Burchaev and G. Y. Ryabykh},
     title = {On approximation of non-analytic functions by analytical ones},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {18--28},
     publisher = {mathdoc},
     number = {1},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2019_1_a1/}
}