Kumar, Rakesh <br/><br/>
Differential equations and calculus of variations 
by Rakesh Kumar and Nagendra Kumar 
 - New Delhi  CBS Publishers and Distributors  2013 
 - xv, 587p. 
<br/><br/><label>ISBN: </label>9788123922041 
<br/><br/><label>Dewey Class. No.: </label>515.35076  / P13 (CSA)