@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/}
}