@article{01582841,
title = {How frequent are discrete cyclic subgroups of semisimple Lie groups?},
journal = {Documenta Mathematica},
volume = {6},
year = {2001},
pages = {29-35},
zbl = {0965.22013},
language = {en},
url = {http://dml.mathdoc.fr/item/01582841}
}
Winkelmann, Jörg. How frequent are discrete cyclic subgroups of semisimple Lie groups?. Documenta Mathematica, Tome 6 (2001) pp. 29-35. http://gdmltest.u-ga.fr/item/01582841/