Braess, Dietrich <br/><br/>
Nonlinear approximation theory 
Dietrich Braess 
 - Berlin  Springer- Verlag  1986 
 - xiv,290p. 
 - Singer series in computational mathematics   7 .
<br/><br/><label>ISBN: </label>387136258 
<br/><br/><label>Dewey Class. No.: </label>511.4 B73N