TY  - JOUR
AU  - S. V. Konyagin
TI  - On approximation properties of closed sets in Banach spaces and the characterization of strongly convex spaces
JO  - Doklady Akademii Nauk
PY  - 1980
SP  - 276
EP  - 280
VL  - 251
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1980_251_2_a4/
LA  - ru
ID  - DAN_1980_251_2_a4
ER  -