@incollection{AST_1978__59-60__95_0,
     author = {Chaperon, Marc},
     title = {Singularit\'es en g\'eom\'etrie de contact},
     booktitle = {Journ\'ees singuli\`eres de Dijon},
     series = {Ast\'erisque},
     pages = {95--118},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {59-60},
     year = {1978},
     mrnumber = {542733},
     zbl = {0406.53034},
     language = {fr},
     url = {http://www.numdam.org/item/AST_1978__59-60__95_0/}
}