TY  - JOUR
AU  - M. E. Kostyukovich
TI  - Nonlinear systems of second-order differential equations with special right-hand sides
JO  - Differencialʹnye uravneniâ
PY  - 1984
SP  - 879
EP  - 882
VL  - 20
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1984_20_5_a18/
LA  - ru
ID  - DE_1984_20_5_a18
ER  -