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@article{CM_1940__7__112_0, author = {Sz\'asz, Otto}, title = {On the {Ces\`aro} and {Riesz} means of {Fourier} series}, journal = {Compositio Mathematica}, pages = {112--122}, publisher = {Johnson Reprint Corporation}, volume = {7}, year = {1940}, zbl = {0021.22003}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CM_1940__7__112_0/} }
Szász, Otto. On the Cesàro and Riesz means of Fourier series. Compositio Mathematica, Tome 7 (1940), pp. 112-122. http://geodesic.mathdoc.fr/item/CM_1940__7__112_0/