Nikol'Skii, S. M. <br/><br/>
Approximation of functions of several variables and imbedding theorems  / 

 - Berlin:  Springer-Verlag,  1975 
 - viii, 418p. 
 - Die Grundlehren der Mathematischen Wissenschaften in Einzeldarstellungen ; 205 .
<br/><br/> "Translated from the Russian by J. M. Danskin" 
<br/><br/><label>Dewey Class. No.: </label>515.73  / N693.AF