TY  - JOUR
AU  - V. S. Mokeichev
TI  - Existence of non-zero periodic solution of differential equations
JO  - Matematičeskoe modelirovanie
PY  - 1995
SP  - 58
VL  - 7
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MM_1995_7_5_a31/
LA  - ru
ID  - MM_1995_7_5_a31
ER  -