@incollection{AST_1985__130__420_0,
     author = {AST},
     title = {Abstract},
     booktitle = {Syst\`emes diff\'erentiels et singularit\'es},
     author = {Collectif},
     series = {Ast\'erisque},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {130},
     year = {1985},
     pages = {420-420},
     language = {en},
     url = {http://www.numdam.org/item/AST_1985__130__420_0}
}