TY  - JOUR
AU  - A. D. Myshkis
TI  - Theorems of Sturm type for linear systems of differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1985
SP  - 1639
EP  - 1641
VL  - 21
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1985_21_9_a29/
LA  - ru
ID  - DE_1985_21_9_a29
ER  -