TY - JOUR AU - V. I. Arnol'd TI - Bifurcations of invariant manifolds of differential equations and normal forms in neighborhoods of elliptic curves JO - Funkcionalʹnyj analiz i ego priloženiâ PY - 1976 SP - 1 EP - 12 VL - 10 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FAA_1976_10_4_a0/ LA - ru ID - FAA_1976_10_4_a0 ER -