@article{MAN_1981__256_163505,
     author = {C.F. Hermann},
     title = {Symmetrische {Hilbertsche} {Modulformen} und {Modulfunktionen} zu {Q} (...17).},
     journal = {Mathematische Annalen},
     pages = {191--198},
     year = {1981},
     volume = {256},
     zbl = {0442.10021},
     url = {http://geodesic.mathdoc.fr/item/MAN_1981__256_163505/}
}