TY  - JOUR
AU  - È. B. Lebedeva
AU  - S. N. Shimanov
TI  - On the theory of linear equations with periodic coefficients, close to constants, and with lag
JO  - Differencialʹnye uravneniâ
PY  - 1968
SP  - 1598
EP  - 1607
VL  - 4
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1968_4_9_a4/
LA  - ru
ID  - DE_1968_4_9_a4
ER  -