@article{MAN_1953__126_160329,
     author = {H. MAASS},
     title = {Die {Differentialgleichungen} in der {Theorie} der  {SIEGELschen} {Modulfunktionen.}},
     journal = {Mathematische Annalen},
     pages = {44--68},
     publisher = {mathdoc},
     volume = {126},
     year = {1953},
     zbl = {0053.05602},
     url = {http://geodesic.mathdoc.fr/item/MAN_1953__126_160329/}
}