Dacorogna, Bernard <br/><br/>
Introduction to the Calculus of Variations 
Bernard Dacorogna 
 - 3rd ed. 
 - USA  World Scientific Publishing Company  2015 
 - x,311p. 
<br/><br/><label>ISBN: </label>9781783265527 
<br/><br/><label>Dewey Class. No.: </label>515.64 D118I