TY  - JOUR
AU  - A. S. Kochurov
TI  - Direct and inverse theorems on approximation by piecewise polynomial functions
JO  - Fundamentalʹnaâ i prikladnaâ matematika
PY  - 2013
SP  - 129
EP  - 144
VL  - 18
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FPM_2013_18_5_a6/
LA  - ru
ID  - FPM_2013_18_5_a6
ER  -