TY  - JOUR
AU  - Yu. I. Neimark
AU  - L. P. Shilnikov
TI  - A condition for the generation of periodic motions
JO  - Doklady Akademii Nauk
PY  - 1965
SP  - 1261
EP  - 1264
VL  - 160
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1965_160_6_a9/
LA  - ru
ID  - DAN_1965_160_6_a9
ER  -