@incollection{SB_1971-1972__14__261_0,
     author = {Hirschowitz, Andr\'e},
     title = {Le groupe de {Cremona}},
     booktitle = {S\'eminaire Bourbaki : vol. 1971/72, expos\'es 400-417},
     series = {S\'eminaire Bourbaki},
     note = {talk:413},
     pages = {261--276},
     publisher = {Springer-Verlag},
     number = {14},
     year = {1973},
     mrnumber = {417176},
     zbl = {0264.14006},
     language = {fr},
     url = {http://archive.numdam.org/item/SB_1971-1972__14__261_0/}
}