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@article{MAN_1978__237_182782, author = {Su-shing Chen}, title = {Spectra of {Discrete} {Uniform} {Subgroups} of {Semisimple} {Lie} {Groups.}}, journal = {Mathematische Annalen}, pages = {157--160}, publisher = {mathdoc}, volume = {237}, year = {1978}, zbl = {0368.22004}, url = {http://geodesic.mathdoc.fr/item/MAN_1978__237_182782/} }
Su-shing Chen. Spectra of Discrete Uniform Subgroups of Semisimple Lie Groups.. Mathematische Annalen, Tome 237 (1978), pp. 157-160. http://geodesic.mathdoc.fr/item/MAN_1978__237_182782/