Mordukhovich, Boris S. <br/><br/>
Variational analysis and and generalized differentiation 1:  basic theory/ 
Boris S. Mordukhovich 
 - New York :  Springer,  2006 
 - v. ;  25 cm. 
<br/><br/><label>ISBN: </label>3540254374 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Calculus of variations<br/>Existence theorems<br/>Mathematical analysis<br/>Numerical differentiation