Gelfand, I. M. <br/><br/>
Calculus of variations / 
by I.M. Gelfand, S.V. Fomin. 
 - Mineola, N.Y. :  Dover Publications,   2009. 
 - vii, 232 p. : ill. ; 22 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9780486414485   
<br/><br/><label>Subjects--Topical Terms: </label><br/>Calculus of variations. ;  General Variation ;  Variational Problems & Integrals
<br/><br/><label>Dewey Class. No.: </label>515.64  / GEL/C