TY  - JOUR
AU  - P. I. Lizorkin
TI  - Direct and inverse theorems of approximation theory for functions on Lobachevsky space
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1992
SP  - 120
EP  - 147
VL  - 194
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TM_1992_194_a8/
LA  - ru
ID  - TM_1992_194_a8
ER  -