@incollection{SB_1972-1973__15__69_0,
     author = {Godbillon, Claude},
     title = {Cohomologies d'alg\`ebres de {Lie} de champs de vecteurs formels},
     booktitle = {S\'eminaire Bourbaki : vol. 1972/73, expos\'es 418-435},
     series = {S\'eminaire Bourbaki},
     note = {talk:421},
     pages = {69--87},
     publisher = {Springer-Verlag},
     number = {15},
     year = {1974},
     mrnumber = {418112},
     zbl = {0296.17010},
     language = {fr},
     url = {http://archive.numdam.org/item/SB_1972-1973__15__69_0/}
}