TY  - JOUR
AU  - I. G. Tsar'kov
TI  - Widths and Jackson's type inequality for abstract functions
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1992
SP  - 219
EP  - 231
VL  - 198
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TM_1992_198_a11/
LA  - ru
ID  - TM_1992_198_a11
ER  -