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@article{IVM_1975_9_a19, author = {G. I. Ryzhankova}, title = {A~property of linear means of {a~Fourier} series}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {108--110}, publisher = {mathdoc}, number = {9}, year = {1975}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1975_9_a19/} }
G. I. Ryzhankova. A~property of linear means of a~Fourier series. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 9 (1975), pp. 108-110. http://geodesic.mathdoc.fr/item/IVM_1975_9_a19/