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@article{DAN_1968_179_5_a7, author = {V. V. Zhuk}, title = {The approximation of periodic functions by linear approximation methods}, journal = {Doklady Akademii Nauk}, pages = {1038--1041}, publisher = {mathdoc}, volume = {179}, number = {5}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1968_179_5_a7/} }
V. V. Zhuk. The approximation of periodic functions by linear approximation methods. Doklady Akademii Nauk, Tome 179 (1968) no. 5, pp. 1038-1041. http://geodesic.mathdoc.fr/item/DAN_1968_179_5_a7/