@article{GDZPPN002284804, title = {Zur Operatorentheorie der Modulformen n-ten Grades.}, journal = {Mathematische Annalen}, volume = {129}, year = {1955}, pages = {351-385}, zbl = {0073.30503}, url = {http://dml.mathdoc.fr/item/GDZPPN002284804} }
Koecher, M. Zur Operatorentheorie der Modulformen n-ten Grades.. Mathematische Annalen, Tome 129 (1955) pp. 351-385. http://gdmltest.u-ga.fr/item/GDZPPN002284804/