Korneichuk, N. <br/><br/>
Exact constants in approximation theory 
N. Korneichuk 
 - Cambridge  Cambridge University Press  1991 
 - xii,452p. 
 - Encyclopedia of mathematics and its applications .
<br/><br/><label>ISBN: </label>0521382343 
<br/><br/><label>Dewey Class. No.: </label>511.4 K842E