TY  - JOUR
AU  - V. I. Guţu
TI  - Periodic solutions of one-dimensional and two-dimensional systems of differential equations with impulses
JO  - Differencialʹnye uravneniâ
PY  - 1990
SP  - 904
EP  - 906
VL  - 26
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1990_26_5_a22/
LA  - ru
ID  - DE_1990_26_5_a22
ER  -