@article{GDZPPN002206854,
title = {On the existence of cusp forms over function fields.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {394},
year = {1989},
pages = {173-187},
zbl = {0667.10014},
url = {http://dml.mathdoc.fr/item/GDZPPN002206854}
}
Efrat, Isaac. On the existence of cusp forms over function fields.. Journal für die reine und angewandte Mathematik, Tome 394 (1989) pp. 173-187. http://gdmltest.u-ga.fr/item/GDZPPN002206854/