@article{MZM_1996_60_3_a6,
     author = {V. I. Ivanov and O. I. Smirnov},
     title = {On {Jackson's} theorem in the space  $\ell_2(\mathbb Z_2^n)$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {390--405},
     publisher = {mathdoc},
     volume = {60},
     number = {3},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1996_60_3_a6/}
}