TY  - JOUR
AU  - I. G. Tsar'kov
TI  - The inequality of Jackson type for abstract functions
JO  - Sbornik. Mathematics
PY  - 1990
SP  - 117
EP  - 142
VL  - 67
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1990_67_1_a6/
LA  - en
ID  - SM_1990_67_1_a6
ER  -