@article{GDZPPN002341298, title = {Small spanning sets of cusp forms.}, journal = {Mathematische Annalen}, volume = {302}, year = {1995}, pages = {629-652}, zbl = {0834.11020}, url = {http://dml.mathdoc.fr/item/GDZPPN002341298} }
Hertling, Peter. Small spanning sets of cusp forms.. Mathematische Annalen, Tome 302 (1995) pp. 629-652. http://gdmltest.u-ga.fr/item/GDZPPN002341298/