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@article{MZM_1991_49_5_a22, author = {N. N. Pustovoitov}, title = {Multidimensional {Jackson} theorem in the $L_2$ space}, journal = {Matemati\v{c}eskie zametki}, pages = {154--156}, publisher = {mathdoc}, volume = {49}, number = {5}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1991_49_5_a22/} }
N. N. Pustovoitov. Multidimensional Jackson theorem in the $L_2$ space. Matematičeskie zametki, Tome 49 (1991) no. 5, pp. 154-156. http://geodesic.mathdoc.fr/item/MZM_1991_49_5_a22/