TY - JOUR AU - A. Yu. Kolesov TI - Bifurcation of periodic motions under $1:1$ Resonance with Jordan blocks JO - Matematičeskie zametki PY - 1996 SP - 450 EP - 451 VL - 60 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1996_60_3_a15/ LA - ru ID - MZM_1996_60_3_a15 ER -