@article{MAN_1883__21_157051,
     author = {Gierster},
     title = {Ueber {Relationen} zwischen {Klassenzahlen} bin\"arer quadratischer {Formen} von negativer {Determinante.} {(Erste} {Abhandlung)}},
     journal = {Mathematische Annalen},
     pages = {1--50},
     publisher = {mathdoc},
     volume = {21},
     year = {1883},
     zbl = {15.0149.04},
     url = {http://geodesic.mathdoc.fr/item/MAN_1883__21_157051/}
}