Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1968_181_1_a6, author = {M. F. Timan}, title = {The order of approximation of a function by {Zygmund's} normal averages}, journal = {Doklady Akademii Nauk}, pages = {29--32}, publisher = {mathdoc}, volume = {181}, number = {1}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1968_181_1_a6/} }
M. F. Timan. The order of approximation of a function by Zygmund's normal averages. Doklady Akademii Nauk, Tome 181 (1968) no. 1, pp. 29-32. http://geodesic.mathdoc.fr/item/DAN_1968_181_1_a6/