TY  - JOUR
AU  - V. N. Gabushin
TI  - The best approximation of the differentiation operator in the metric of~$L_p$
JO  - Matematičeskie zametki
PY  - 1972
SP  - 531
EP  - 538
VL  - 12
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1972_12_5_a4/
LA  - ru
ID  - MZM_1972_12_5_a4
ER  -