Nikol'skii, S.M <br/><br/>
Approximation of functions of several variables & imbedding theorems 
S.M. Nikol'skii 
 - Berlin  Springer  1975 
 - viii  420 
 - Die grundlehren der mathematischen wissenschaften-Band 205 .
<br/><br/><label>Dewey Class. No.: </label>5.08+4.04  / NIKO