Analysis II  convex analysis and approximation theory 
ed. by R.V. Gamkrelidze 
 - Berlin  Springer-Verlag  1990 
 - 255p. 
 - Encyclopaedia of Mathematical Sciences  V.14 .
<br/><br/><label>ISBN: </label>3540181792 
<br/><br/><label>Dewey Class. No.: </label>515.72  / N892.2