AKHIEZER Naum I. <br/><br/>
Calculus of variations. 
AKHIEZER Naum I. 
 - New York  Blaisdell Publishing Co.         1962 
 - viii,247p.  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>B32, K2/SC