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@article{IVM_1997_10_a2, author = {V. \`E. Gheit}, title = {Approximation properties of higher derivatives of periodic functions}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {24--30}, publisher = {mathdoc}, number = {10}, year = {1997}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1997_10_a2/} }
V. È. Gheit. Approximation properties of higher derivatives of periodic functions. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 10 (1997), pp. 24-30. http://geodesic.mathdoc.fr/item/IVM_1997_10_a2/