hal-01398224 title_s Growth of quotients of groups acting by isometries on Gromov hyperbolic spaces auteur Stéphane Sabourau journal Journal of modern dynamics volume 7 numero 2 pages 269-290 doi 10.3934/jmd.2013.7.269 fichier_hal https://hal.archives-ouvertes.fr/hal-01398224/document annee 2013 Identifiant HAL 822731