TY  - JOUR
AU  - È. I. Grudo
TI  - A differential system with two purely imaginary roots of a characteristic equation
JO  - Differencialʹnye uravneniâ
PY  - 1980
SP  - 963
EP  - 979
VL  - 16
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1980_16_6_a0/
LA  - ru
ID  - DE_1980_16_6_a0
ER  -