TY  - BOOK
AU  - Nikol'skii,S.M
TI  - Approximation of functions of several variables & imbedding theorems
T2  - Die grundlehren der mathematischen wissenschaften-Band 205
U1  - 5.08+4.04 
PY  - 1975///
CY  - Berlin
PB  - Springer
ER  -