TY  - JOUR
AU  - M. A. Ivanov
TI  - The behavior of solutions of a perturbed homogeneous system of second-order differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1989
SP  - 1810
EP  - 1812
VL  - 25
IS  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1989_25_10_a23/
LA  - ru
ID  - DE_1989_25_10_a23
ER  -