@article{MZ_1990__204_3_183788,
     author = {Aloys Krieg},
     title = {The {Maa{\ss}} {Space} and {Hecke} {Operators.}},
     journal = {Mathematische Zeitschrift},
     pages = {527--550},
     year = {1990},
     volume = {204},
     number = {3},
     zbl = {0683.10024},
     url = {http://geodesic.mathdoc.fr/item/MZ_1990__204_3_183788/}
}