TY  - JOUR
AU  - E. A. Troitskaya
TI  - Recourse to the general theory of approximation methods in investigating the problem of determination of characteristic 

JO  - Doklady Akademii Nauk
PY  - 1957
SP  - 998
EP  - 1001
VL  - 113
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1957_113_5_a13/
LA  - ru
ID  - DAN_1957_113_5_a13
ER  -