Convexity and optimization in Banach spaces 
Barbu, Viorel. 
 - BucareÅŸti : | Alphen aan de Rijn :  Editura Academiei ; | Sijthoff & Noordhoff,  1978 
 - xi, 316 p.  ;  21 cm. 
<br/><br/> Revised and enlarged translation of Convexitate şi optimizare în spaţii Banach. | Includes index." 
<br/><br/><label>ISBN: </label>9789048183975 (pbk.: