@article{MZ_1929__29_168055,
     author = {M. Jacob},
     title = {\"Uber die {Summierbarkeit} von {Fourierschen} {Reihen}  und {Integralen}},
     journal = {Mathematische Zeitschrift},
     pages = {20--33},
     publisher = {mathdoc},
     volume = {29},
     year = {1929},
     zbl = {54.0304.02},
     url = {http://geodesic.mathdoc.fr/item/MZ_1929__29_168055/}
}