TY  - JOUR
AU  - M. T. Terekhin
AU  - N. V. Retyunskikh
TI  - Periodic Solutions of Nonlinear Nonautonomous Systems of Ordinary Differential Equations
JO  - Differencialʹnye uravneniâ
PY  - 2001
SP  - 566
EP  - 569
VL  - 37
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_2001_37_4_a16/
LA  - ru
ID  - DE_2001_37_4_a16
ER  -