TY  - JOUR
AU  - I. V. Petrova
TI  - Some aspects of the theory of $L_2$-approximations on a hyperboloid in $R^{n,1}$
JO  - Doklady Akademii Nauk
PY  - 1990
SP  - 298
EP  - 304
VL  - 310
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1990_310_2_a9/
LA  - ru
ID  - DAN_1990_310_2_a9
ER  -