TY  - JOUR
AU  - Roman R. Akopyan
TI  - Approximation of the differentiation operator on the class of functions analytic in an annulus
JO  - Ural mathematical journal
PY  - 2017
SP  - 6
EP  - 13
VL  - 3
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/UMJ_2017_3_2_a1/
LA  - en
ID  - UMJ_2017_3_2_a1
ER  -