@incollection{SB_1976-1977__19__218_0,
     author = {Tits, Jacques},
     title = {Groupes de {Whitehead} de groupes alg\'ebriques simples sur un corps},
     booktitle = {S\'eminaire Bourbaki : vol. 1976/77, expos\'es 489-506},
     series = {S\'eminaire Bourbaki},
     note = {talk:505},
     pages = {218--236},
     publisher = {Springer-Verlag},
     number = {19},
     year = {1978},
     mrnumber = {521771},
     zbl = {0389.16007},
     language = {fr},
     url = {http://www.numdam.org/item/SB_1976-1977__19__218_0/}
}