TY  - JOUR
AU  - È. I. Grudo
TI  - A differential system with a zero root of the characteristic equation and with periodic coefficients
JO  - Differencialʹnye uravneniâ
PY  - 1978
SP  - 974
EP  - 993
VL  - 14
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1978_14_6_a1/
LA  - ru
ID  - DE_1978_14_6_a1
ER  -