I. M. GELFAND <br/><br/>
CALCULUS OF VARIATIONS 

 - 1ST 
 - NEW YORK  DOVER PUBLICATIONS, INC.  2000 
 -  VII,232P 
<br/><br/><label>ISBN: </label>9.7804864145e+012 
<br/><br/><label>Dewey Class. No.: </label>515.64/GEL/CAL