TY  - JOUR
AU  - L. B. Zelenko
AU  - F. S. Rofe-Beketov
TI  - The limit spectrum of systems of first order differential equations with slowly changing coefficients
JO  - Differencialʹnye uravneniâ
PY  - 1971
SP  - 1982
EP  - 1991
VL  - 7
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1971_7_11_a5/
LA  - ru
ID  - DE_1971_7_11_a5
ER  -