@incollection{AST_1976__31__3_0,
     author = {Thom, Ren\'e},
     title = {Introduction \`a la dynamique qualitative},
     booktitle = {Trois \'etudes en dynamique qualitative},
     series = {Ast\'erisque},
     pages = {3--13},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {31},
     year = {1976},
     mrnumber = {501104},
     zbl = {0323.58011},
     language = {fr},
     url = {http://archive.numdam.org/item/AST_1976__31__3_0/}
}