@article{10_4064_ap_4_2_183_200,
     author = {J. Meder},
     title = {On the estimation of {Ces\`aro} means of orthonormal series},
     journal = {Annales Polonici Mathematici},
     pages = {183--200},
     publisher = {mathdoc},
     volume = {4},
     number = {2},
     year = {1957},
     doi = {10.4064/ap-4-2-183-200},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-4-2-183-200/}
}