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@article{MZM_1977_22_4_a16, author = {P. V. Ermakov}, title = {The convergence of some linear operators to functions of class $Z_\alpha$}, journal = {Matemati\v{c}eskie zametki}, pages = {601--607}, publisher = {mathdoc}, volume = {22}, number = {4}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1977_22_4_a16/} }
P. V. Ermakov. The convergence of some linear operators to functions of class $Z_\alpha$. Matematičeskie zametki, Tome 22 (1977) no. 4, pp. 601-607. http://geodesic.mathdoc.fr/item/MZM_1977_22_4_a16/