@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/