TY  - JOUR
AU  - A. K. Lopatin
TI  - The algebraic reducibility of systems of linear differential equations. I
JO  - Differencialʹnye uravneniâ
PY  - 1968
SP  - 439
EP  - 445
VL  - 4
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1968_4_3_a5/
LA  - ru
ID  - DE_1968_4_3_a5
ER  -