@incollection{SB_1983-1984__26__105_0,
     author = {Tits, Jacques},
     title = {Le monstre},
     booktitle = {S\'eminaire Bourbaki : volume 1983/84, expos\'es 615-632},
     series = {Ast\'erisque},
     note = {talk:620},
     pages = {105--122},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {121-122},
     year = {1985},
     mrnumber = {768956},
     zbl = {0548.20010},
     language = {fr},
     url = {http://www.numdam.org/item/SB_1983-1984__26__105_0/}
}