Rockafellar,Tyrell R.  <br/><br/>
Variational Analysis 
Rockafellar,Tyrell R.  
 - New York  Springer-Verlag  1997 
 - 681  Illustration,index,reference & graph 
<br/><br/><label>ISBN: </label>3540627723 
<br/><br/><label>Dewey Class. No.: </label>515  / R5907