@article{GDZPPN002198312,
title = {On the group S L 2 over orders of arithmetic type.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {329},
year = {1981},
pages = {153-171},
zbl = {0447.20035},
url = {http://dml.mathdoc.fr/item/GDZPPN002198312}
}
Liehl, Bernhard. On the group S L 2 over orders of arithmetic type.. Journal für die reine und angewandte Mathematik, Tome 329 (1981) pp. 153-171. http://gdmltest.u-ga.fr/item/GDZPPN002198312/