Bogaevski, V.N. <br/><br/>
Algebraic methods in nonlinear perturbation theory 

 - New York  Springer-Verlag  1991 
 - xii,265p.  22cm 
 - Applied mathematical science .
<br/><br/><label>ISBN: </label>0387974911 
<br/><br/><label>Dewey Class. No.: </label>515.35  / BOG