@article{MAN_1966__164_161386,
     author = {R. FRITZSCHE},
     title = {Beitrag zur {Theorie} der {Modulfunktionen} 2. {Grades.} {II.}},
     journal = {Mathematische Annalen},
     pages = {54--57},
     publisher = {mathdoc},
     volume = {164},
     year = {1966},
     zbl = {0156.09202},
     url = {http://geodesic.mathdoc.fr/item/MAN_1966__164_161386/}
}