TY  - JOUR
AU  - P. I. Lizorkin
TI  - On the approximation of functions on the sphere $\sigma$. On the
JO  - Doklady Akademii Nauk
PY  - 1993
SP  - 555
EP  - 558
VL  - 331
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1993_331_5_a7/
LA  - ru
ID  - DAN_1993_331_5_a7
ER  -