Singer, Ivan <br/><br/>
Best approximation in normed linear spaces by elements of linear subspaces   

 - New York  Springer-Verlag  1970 
 - 415p. Index 
<br/><br/> (Die Grundlehran der mathematischen Wissenschaften in Einzeldarstellungen, 171)   
<br/><br/><label>Dewey Class. No.: </label>515.73  / Si617.BA