TY - JOUR AU - V. A. Lunkevich AU - K. S. Sibirskii TI - Integrals of a system with homogeneous nonlinearities of the third degree in cases of a center JO - Differencialʹnye uravneniâ PY - 1984 SP - 1360 EP - 1365 VL - 20 IS - 8 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1984_20_8_a8/ LA - ru ID - DE_1984_20_8_a8 ER -