@article{ASENS_1997_4_30_2_147_0,
     author = {Paulin, Fr\'ed\'eric},
     title = {Sur les automorphismes ext\'erieurs des groupes hyperboliques},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {147--167},
     publisher = {Elsevier},
     volume = {4e s{\'e}rie, 30},
     number = {2},
     year = {1997},
     doi = {10.1016/s0012-9593(97)89917-x},
     mrnumber = {98c:20070},
     zbl = {0877.20014},
     language = {fr},
     url = {http://www.numdam.org/articles/10.1016/s0012-9593(97)89917-x/}
}