@article{PPN235181684_0237+dmdlog24,
title = {Spectra of Discrete Uniform Subgroups of Semisimple Lie Groups.},
journal = {Mathematische Annalen},
volume = {237},
year = {1978},
pages = {157-160},
zbl = {0368.22004},
url = {http://dml.mathdoc.fr/item/PPN235181684_0237+dmdlog24}
}
Chen, Su-shing. Spectra of Discrete Uniform Subgroups of Semisimple Lie Groups.. Mathematische Annalen, Tome 237 (1978) pp. 157-160. http://gdmltest.u-ga.fr/item/PPN235181684_0237+dmdlog24/