TY  - JOUR
AU  - N. L. Shcheglova
TI  - Investigation of systems with homogeneous cubic nonlinearities that have a focus and a center
JO  - Differencialʹnye uravneniâ
PY  - 1993
SP  - 246
EP  - 255
VL  - 29
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1993_29_2_a7/
LA  - ru
ID  - DE_1993_29_2_a7
ER  -