TY  - JOUR
AU  - A. L. Rublev
TI  - On approximation of the differentiation operator over the class of twice differentiable functions in the space $L_2(0,\infty)$
JO  - Trudy Instituta matematiki i mehaniki
PY  - 1996
SP  - 162
EP  - 170
VL  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TIMM_1996_4_a12/
LA  - ru
ID  - TIMM_1996_4_a12
ER  -