Ekeland, I & Temam, R <br/><br/>
Convex analysis & variational problems 
I. Ekeland & R. Temam 
 - Amsterdam  North-Holland Pub. Co.  1976 
 - ix  402 
 - Studies in mathematics & its applications 1 .
<br/><br/><label>Dewey Class. No.: </label>5.07+4.13  / EKEL