TY  - JOUR
AU  - N. A. Izobov
AU  - O. P. Stepanovich
TI  - Exponentially decreasing perturbations that preserve the characteristic exponents of a linear diagonal system
JO  - Differencialʹnye uravneniâ
PY  - 1990
SP  - 934
EP  - 943
VL  - 26
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1990_26_6_a2/
LA  - ru
ID  - DE_1990_26_6_a2
ER  -