@incollection{AST_1984__116__70_0,
     author = {Haefliger, Andr\'e},
     title = {Groupoides d'holonomie et classifiants},
     booktitle = {Structure transverse des feuilletages},
     series = {Ast\'erisque},
     pages = {70--97},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {116},
     year = {1984},
     zbl = {0562.57012},
     language = {fr},
     url = {http://www.numdam.org/item/AST_1984__116__70_0/}
}