Ciesielski Z.  Editor <br/><br/>
Approximation Theory. V.4.Papers presented at the Stefan Banach International Mathematical Centre at the Semester "Approximation Theory" helld  September 17-December 17,1975 
Ciesielski Z.  Editor 
 - Warszawa  Warszawa  1979 
 - 316 p. 
<br/><br/> Banach Centre :Publications 
<br/><br/><label>Dewey Class. No.: </label>51:061.2/3