TY  - JOUR
AU  - A. V. Zhevnyak
TI  - The direction vector method for investigating the stability of singular points of nonlinear systems. I. Theory
JO  - Differencialʹnye uravneniâ
PY  - 1985
SP  - 562
EP  - 572
VL  - 21
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1985_21_4_a1/
LA  - ru
ID  - DE_1985_21_4_a1
ER  -