TY  - JOUR
AU  - A. P. Buslaev
TI  - Approximation of a differentiation operator
JO  - Matematičeskie zametki
PY  - 1981
SP  - 731
EP  - 742
VL  - 29
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1981_29_5_a6/
LA  - ru
ID  - MZM_1981_29_5_a6
ER  -