@article{MZ_1932__35_168382,
     author = {A., Walfisz},
     title = {\"Uber einige trigonometrische {Summen.} {Zweite} {Abhandlung}},
     journal = {Mathematische Zeitschrift},
     pages = {774--788},
     publisher = {mathdoc},
     volume = {35},
     year = {1932},
     zbl = {58.0203.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1932__35_168382/}
}