@article{MZ_1952__56_169278,
     author = {Oskar Perron},
     title = {Bemerkungen \"uber die {Verteilung} der quadratischen {Reste.}},
     journal = {Mathematische Zeitschrift},
     pages = {122--130},
     publisher = {mathdoc},
     volume = {56},
     year = {1952},
     zbl = {0048.03002},
     url = {http://geodesic.mathdoc.fr/item/MZ_1952__56_169278/}
}