TY  - JOUR
AU  - A. A. Abdugapparov
TI  - On rational approximations of functions with a~convex derivative
JO  - Sbornik. Mathematics
PY  - 1974
SP  - 619
EP  - 629
VL  - 22
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1974_22_4_a10/
LA  - en
ID  - SM_1974_22_4_a10
ER  -