@article{MAN_1939__116_160024,
     author = {C.L. Siegel},
     title = {Einf\"uhrung in die {Theorie} der {Modulfunktionen} n-ten {Grades}},
     journal = {Mathematische Annalen},
     pages = {617--657},
     publisher = {mathdoc},
     volume = {116},
     year = {1939},
     zbl = {0021.20302},
     url = {http://geodesic.mathdoc.fr/item/MAN_1939__116_160024/}
}