@article{01736444,
title = {Strong Tits alternative for subgroups of Coxeter groups.},
journal = {Journal of Lie Theory},
volume = {12},
year = {2002},
pages = {259-264},
zbl = {0999.20029},
language = {en},
url = {http://dml.mathdoc.fr/item/01736444}
}
Noskov, Guennadi A.; Vinberg, Èrnest B. Strong Tits alternative for subgroups of Coxeter groups.. Journal of Lie Theory, Tome 12 (2002) pp. 259-264. http://gdmltest.u-ga.fr/item/01736444/