Gelfand, I M <br/><br/>
Calculus of variations 

 - New York  Dover  2000 
 - 232 
<br/><br/><label>ISBN: </label>9780486322582 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>515  GEL