%0 Book Section %A Field, Mike %T Singularity theory and equivariant dynamical systems %B International conference on dynamical systems in mathematical physics %A Collectif %S Astérisque %D 1976 %P 67-78 %N 40 %I Société mathématique de France %U http://www.numdam.org/item/AST_1976__40__67_0/ %G en %F AST_1976__40__67_0