TY  - JOUR
AU  - A. I. Stepanets
TI  - The approximation of continuous periodic functions of two variables by Faward sums
JO  - Matematičeskie zametki
PY  - 1973
SP  - 655
EP  - 666
VL  - 13
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1973_13_5_a3/
LA  - ru
ID  - MZM_1973_13_5_a3
ER  -