@incollection{AST_1987__150-151__131_0,
     author = {Martinet, Jean},
     title = {Remarques sur la bifurcation n{\oe}ud-col dans le domaine complexe},
     booktitle = {Singularit\'es d'\'equations diff\'erentielles - Dijon, 20-25 mai 1985},
     series = {Ast\'erisque},
     pages = {131--149},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {150-151},
     year = {1987},
     zbl = {0655.58025},
     language = {fr},
     url = {http://www.numdam.org/item/AST_1987__150-151__131_0/}
}