Borwein, Jonathan M. <br/><br/>
Techniques of variational analysis / 
Jonathan M. Borwein, Qiji Zhu. 
 - [S.l.] :  Springer,  2005. 
 - 372 p. ;  24 cm. 
 - Cms books in mathematics. .
 - Cms books in mathematics. .
<br/><br/><label>ISBN: </label>0387242988 9780387242989 
<br/><br/><label>Dewey Class. No.: </label>515.64