TY  - JOUR
AU  - A. V. Lasunsky
TI  - On a small variation of the characteristic indices of a regular linear system
JO  - Differencialʹnye uravneniâ
PY  - 1985
SP  - 901
EP  - 903
VL  - 21
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1985_21_5_a25/
LA  - ru
ID  - DE_1985_21_5_a25
ER  -