@article{MZM_1983_33_2_a7,
     author = {V. V. Shalaev},
     title = {Exact estimates of approximation of periodic functions by linear polynomial methods of convolution type},
     journal = {Matemati\v{c}eskie zametki},
     pages = {227--234},
     publisher = {mathdoc},
     volume = {33},
     number = {2},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1983_33_2_a7/}
}