TY  - JOUR
AU  - Yu. V. Churin
TI  - The behavior of periodic solutions of a system of second order differential equations with polynomial right-hand sides
JO  - Differencialʹnye uravneniâ
PY  - 1968
SP  - 1821
EP  - 1834
VL  - 4
IS  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1968_4_10_a6/
LA  - ru
ID  - DE_1968_4_10_a6
ER  -