@article{MZ_1921__9_167620,
     author = {G., Szeg\"o},
     title = {\"Uber die {Lebesgueschen} {Konstanten} bei den {Fourierschen} {Reihen}},
     journal = {Mathematische Zeitschrift},
     pages = {163--166},
     publisher = {mathdoc},
     volume = {9},
     year = {1921},
     zbl = {48.0307.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1921__9_167620/}
}