TY  - JOUR
AU  - G. A. Los'
TI  - A solution of the stability problem for a system of linear differential equations with $\pi $-periodic coefficients by means of the $\pi /4$-characteristic equation
JO  - Differencialʹnye uravneniâ
PY  - 1970
SP  - 565
EP  - 568
VL  - 6
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1970_6_3_a21/
LA  - ru
ID  - DE_1970_6_3_a21
ER  -