TY  - JOUR
AU  - Yu. A. Mitropol'skii
AU  - A. M. Samoilenko
AU  - V. L. Kulik
TI  - Application of quadratic forms to the study of systems of linear differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1985
SP  - 776
EP  - 788
VL  - 21
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1985_21_5_a6/
LA  - ru
ID  - DE_1985_21_5_a6
ER  -