@article{MAN_1933__108_159623,
     author = {A. Walfisz},
     title = {\"Uber die {Koeffizientensummen} einiger {Modulformen}},
     journal = {Mathematische Annalen},
     pages = {75--90},
     publisher = {mathdoc},
     volume = {108},
     year = {1933},
     zbl = {59.0213.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1933__108_159623/}
}