@article{GDZPPN002263998, title = {\"Uber summierbare trigonometrische Reihen}, journal = {Mathematische Annalen}, volume = {71}, year = {1912}, pages = {54-75}, zbl = {42.0282.01}, url = {http://dml.mathdoc.fr/item/GDZPPN002263998} }
Riesz, M. Über summierbare trigonometrische Reihen. Mathematische Annalen, Tome 71 (1912) pp. 54-75. http://gdmltest.u-ga.fr/item/GDZPPN002263998/