Elementary stability and bifurcation theory 
Iooss, Gérard. 
 - 2nd ed. 
 - New York :  Springer-Verlag,  1990 
 - xxiii, 324 p. :  ill. ;  25 cm. 
 - Undergraduate texts in mathematics .
<br/><br/><label>ISBN: </label>0387970681 (alk. paper) | 0387966757