Singularities and groups in bifurcation theory  
Golubitsky, Martin, 
 - New York :  Springer-Verlag,  1985 
 - 2 v. :  ill. ;  25 cm. 
<br/><br/> Vol. 2 co-authored by Ian Stewart. 
<br/><br/><label>ISBN: </label>0387909990 (v. 1) | 0387966528 (v. 2)