@incollection{AST_1978__59-60__131_0,
     author = {Kuiper, Nicolaas H.},
     title = {La topologie des singularit\'es hyperboliques des actions de $\mathbb{R}^2$},
     booktitle = {Journ\'ees singuli\`eres de Dijon},
     series = {Ast\'erisque},
     pages = {131--150},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {59-60},
     year = {1978},
     mrnumber = {542735},
     zbl = {0476.58015},
     language = {fr},
     url = {http://www.numdam.org/item/AST_1978__59-60__131_0/}
}