@article{MZ_1953__59_169400,
     author = {Max Koecher},
     title = {Zur {Theorie} der {Modulformen} n-ten {Grades.} {I.}},
     journal = {Mathematische Zeitschrift},
     pages = {399--416},
     publisher = {mathdoc},
     volume = {59},
     year = {1953},
     zbl = {0055.07704},
     url = {http://geodesic.mathdoc.fr/item/MZ_1953__59_169400/}
}