TY  - JOUR
AU  - S. N. Kudryavtsev
TI  - On~approximations of compact sets of functions by piecewise polynomial surfaces
JO  - Izvestiya. Mathematics 
PY  - 1988
SP  - 455
EP  - 480
VL  - 31
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1988_31_3_a1/
LA  - en
ID  - IM2_1988_31_3_a1
ER  -