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@article{IVM_1972_8_a10, author = {Ya. G. Pritula}, title = {Jackson's inequality for $B^2$-almost periodic functions}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {90--93}, publisher = {mathdoc}, number = {8}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1972_8_a10/} }
Ya. G. Pritula. Jackson's inequality for $B^2$-almost periodic functions. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 8 (1972), pp. 90-93. http://geodesic.mathdoc.fr/item/IVM_1972_8_a10/