TY  - JOUR
AU  - V. A. Pliss
TI  - The position of the separatrices of saddle-point periodic motions of systems of second order differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1971
SP  - 1199
EP  - 1225
VL  - 7
IS  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1971_7_7_a5/
LA  - ru
ID  - DE_1971_7_7_a5
ER  -