@article{1183506877,
author = {Zygmund, A.},
title = {On the degree of approximation of functions by Fej\'er means},
journal = {Bull. Amer. Math. Soc.},
volume = {51},
number = {11},
year = {1945},
pages = { 274-278},
language = {en},
url = {http://dml.mathdoc.fr/item/1183506877}
}
Zygmund, A. On the degree of approximation of functions by Fejér means. Bull. Amer. Math. Soc., Tome 51 (1945) no. 11, pp. 274-278. http://gdmltest.u-ga.fr/item/1183506877/