TY  - JOUR
AU  - A. I. Vasil'ev
TI  - On Bernstein's theorem about a sequence of best approximations in spaces $L^{\varphi}$.
JO  - Trudy Instituta matematiki i mehaniki
PY  - 1998
SP  - 227
EP  - 246
VL  - 5
UR  - http://geodesic.mathdoc.fr/item/TIMM_1998_5_a16/
LA  - ru
ID  - TIMM_1998_5_a16
ER  -