TY  - JOUR
AU  - V. A. Pliss
TI  - On separatrices of periodic saddle motions for periodic systems of second-order differential equations
JO  - Doklady Akademii Nauk
PY  - 1971
SP  - 275
EP  - 276
VL  - 197
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1971_197_2_a6/
LA  - ru
ID  - DAN_1971_197_2_a6
ER  -