@incollection{AST_1976__36-37__79_0,
     author = {Pourcin, Genevi\`eve},
     title = {Grassmanniennes de MacPherson},
     booktitle = {S\'eminaire de g\'eom\'etrie analytique},
     editor = {Douady Adrien and Verdier Jean-Louis},
     series = {Ast\'erisque},
     note = {talk:IV},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {36-37},
     year = {1976},
     zbl = {0354.14004},
     mrnumber = {429881},
     language = {fr},
     url = {archive.numdam.org/item/AST_1976__36-37__79_0/}
}

Pourcin, Geneviève. Grassmanniennes de MacPherson, dans Séminaire de géométrie analytique, Astérisque, no. 36-37 (1976), Exposé no. IV, 7 p. http://archive.numdam.org/item/AST_1976__36-37__79_0/