@article{DAN_1968_181_1_a6,
     author = {M. F. Timan},
     title = {The order of approximation of a function by {Zygmund's} normal averages},
     journal = {Doklady Akademii Nauk},
     pages = {29--32},
     publisher = {mathdoc},
     volume = {181},
     number = {1},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_181_1_a6/}
}