TY  - JOUR
AU  - A. I. Stepanets
TI  - Approximations on classes of $(\psi,\beta)$-differentiable functions
JO  - Doklady Akademii Nauk
PY  - 1987
SP  - 797
EP  - 800
VL  - 293
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1987_293_4_a5/
LA  - ru
ID  - DAN_1987_293_4_a5
ER  -