@article{GDZPPN002431157, title = {Modular Forms of Varying Weight. I.}, journal = {Mathematische Zeitschrift}, volume = {189}, year = {1985}, pages = {477-496}, zbl = {0553.10021}, url = {http://dml.mathdoc.fr/item/GDZPPN002431157} }
Bruggeman, Roelof W. Modular Forms of Varying Weight. I.. Mathematische Zeitschrift, Tome 189 (1985) pp. 477-496. http://gdmltest.u-ga.fr/item/GDZPPN002431157/