TY  - JOUR
AU  - I. E. Vitrichenko
TI  - On the stability in a critical case of a zero and a pair of pure imaginary roots of an $n$-th order nonautonomous nonlinear equation
JO  - Differencialʹnye uravneniâ
PY  - 1991
SP  - 350
EP  - 354
VL  - 27
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1991_27_2_a20/
LA  - ru
ID  - DE_1991_27_2_a20
ER  -