Veinberg, M. M. <br/><br/>
Theory of branching of solutions of non-linear equations   
by M.M.Veinberg, V.A.Trenogin 
 - Leyden  Nordhoff International Publishing  1974 
 - xxvi, 485p. 
<br/><br/><label>LCCN: </label>72-76788 
<br/><br/><label>Dewey Class. No.: </label>515.35  / N741