@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/