TY  - JOUR
AU  - Kh. P. Rustamov
TI  - On direct and inverse theorems for the best $L_p$-approximation on a sphere
JO  - Doklady Akademii Nauk
PY  - 1987
SP  - 788
EP  - 791
VL  - 294
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1987_294_4_a3/
LA  - ru
ID  - DAN_1987_294_4_a3
ER  -