Phelps, Robert R. <br/><br/>
Convex functions, monotone operators and differentiability 

 - Berlin  Springer-Verlag  1989 
 - vii,114p, 23cm 
 - Lecture notes on mathematics .
<br/><br/><label>ISBN: </label>3540507353 
<br/><br/><label>Dewey Class. No.: </label>515.732,  / D, phe