Convex analysis : 
Magaril-Ilʹyaev, G. G. 
 - Providence, R.I. :  American Mathematical Society,  2003 
 - viii, 183 p. :  ill. ;  27 cm. 
 - Translations of mathematical monographs,  v. 222 .
<br/><br/><label>ISBN: </label>0821835254 (acid-free paper)