TY  - JOUR
AU  - N. A. Izobov
TI  - Stability with respect to the first approximation
JO  - Differencialʹnye uravneniâ
PY  - 1966
SP  - 898
EP  - 907
VL  - 2
IS  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1966_2_7_a3/
LA  - ru
ID  - DE_1966_2_7_a3
ER  -