Rockafellar, R. Tyrrell., <br/><br/>
Variational analysis 

 - New York:  Springer, ,  c1998. . 
 - xiii, 733 p.:  ill;  25cm. 
 - Grundlehren der mathematischen Wissenschaften;   317. .
<br/><br/> Includes bibliographical references (p. [684]-708) and indexes.  
<br/><br/><label>ISBN: </label>9783540627722 
<br/><br/><label>Dewey Class. No.: </label>515.64 ROC