@article{MZM_1973_13_6_a3,
     author = {V. A. Yudin},
     title = {The approximation of functions of many variables by their {F\'ej\'er} sums},
     journal = {Matemati\v{c}eskie zametki},
     pages = {817--828},
     publisher = {mathdoc},
     volume = {13},
     number = {6},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1973_13_6_a3/}
}