TY  - JOUR
AU  - E. L. Tonkov
AU  - G. I. Yutkin
TI  - Periodic solutions, and stability of a linear differential equation with periodic coefficients
JO  - Differencialʹnye uravneniâ
PY  - 1969
SP  - 1990
EP  - 2001
VL  - 5
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1969_5_11_a4/
LA  - ru
ID  - DE_1969_5_11_a4
ER  -