Shivamoggi, himsenk. <br/><br/>
Perturbation methods for differential equations 
himsenk. Shivamoggi 
 - Boston  Birkhauser  2003 
 - xiv,354p. 
<br/><br/><label>ISBN: </label>817641890  3520.36 
<br/><br/><label>Dewey Class. No.: </label>515.35 Sh 69 P