@article{01139214,
title = {On the cuspidal divisor class group of a Drinfeld modular curve.},
journal = {Documenta Mathematica},
volume = {2},
year = {1997},
pages = {351-374},
zbl = {0895.11024},
language = {en},
url = {http://dml.mathdoc.fr/item/01139214}
}
Gekeler, Ernst-Ulrich. On the cuspidal divisor class group of a Drinfeld modular curve.. Documenta Mathematica, Tome 2 (1997) pp. 351-374. http://gdmltest.u-ga.fr/item/01139214/