@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://www.numdam.org/item/CM_1940__7__112_0/}
}