@article{GDZPPN002428369,
title = {Tits Geometries and Parabolic Systems in Finitely Generated Groups I.},
journal = {Mathematische Zeitschrift},
volume = {183},
year = {1983},
pages = {377-396},
zbl = {0521.20007},
url = {http://dml.mathdoc.fr/item/GDZPPN002428369}
}
Timmesfeld, Franz G. Tits Geometries and Parabolic Systems in Finitely Generated Groups I.. Mathematische Zeitschrift, Tome 183 (1983) pp. 377-396. http://gdmltest.u-ga.fr/item/GDZPPN002428369/