@article{GDZPPN00210251X,
title = {On liftings and cusp cohomology of arithmetic groups.},
journal = {Inventiones mathematicae},
volume = {83},
year = {1986},
pages = {383-402},
zbl = {0581.10013},
url = {http://dml.mathdoc.fr/item/GDZPPN00210251X}
}
Labesse, J.-P.; Schwermer, J. On liftings and cusp cohomology of arithmetic groups.. Inventiones mathematicae, Tome 83 (1986) pp. 383-402. http://gdmltest.u-ga.fr/item/GDZPPN00210251X/