TY  - JOUR
AU  - A. F. Andreev
TI  - A sharpening of the uniqueness theorem for an $O$-curve in $N_2$
JO  - Doklady Akademii Nauk
PY  - 1962
SP  - 9
EP  - 10
VL  - 146
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1962_146_1_a0/
LA  - ru
ID  - DAN_1962_146_1_a0
ER  -