@article{MAN_1921__84_158879,
     author = {J.G. van der Corput},
     title = {Zahlentheoretische {Absch\"atzungen}},
     journal = {Mathematische Annalen},
     pages = {53--79},
     publisher = {mathdoc},
     volume = {84},
     year = {1921},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1921__84_158879/}
}