Rockfellar, R. Tyrrell <br/><br/>
Convex analysis 
by R Tyrrell Rockfellar 
 - New Jersey  Princeton  1970 
 - xviii, 451p. 
 - Princeton mathematical series   .
<br/><br/><label>ISBN: </label>0691080690 
<br/><br/><label>Dewey Class. No.: </label>519.7  / N705;1