Bernard Dacorogna <br/><br/>
Direct Methods in The Calculus of Variations 

 - 2nd 
 - Newyork  Springer  2008 
 - 619 
<br/><br/><label>ISBN: </label>9781441922595 
<br/><br/><label>Dewey Class. No.: </label>515.64  / DAC/D