Gelfand, I M and Fomin, S V <br/><br/>
Calculus of Variations 

 - New York  Dover Publications, Inc.  2000 
 - 232 
<br/><br/><label>ISBN: </label>0486414485 
<br/><br/><label>Subjects--Personal Names: </label> Mathematics 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics