@article{MAN_1923__88_158985,
     author = {C.L. Siegel},
     title = {Additive {Theorie} der {Zahlk\"orper.} {II.}},
     journal = {Mathematische Annalen},
     pages = {184--210},
     year = {1923},
     volume = {88},
     zbl = {49.0128.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1923__88_158985/}
}