@article{GDZPPN002204711,
title = {The non-semi-simple term in the trace formula for rank one lattices.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {374},
year = {1987},
pages = {1-21},
zbl = {0609.22005},
url = {http://dml.mathdoc.fr/item/GDZPPN002204711}
}
Hoffmann, Werner. The non-semi-simple term in the trace formula for rank one lattices.. Journal für die reine und angewandte Mathematik, Tome 374 (1987) pp. 1-21. http://gdmltest.u-ga.fr/item/GDZPPN002204711/