TY - JOUR AU - Yu. V. Usachev TI - Bifurcation of invariant tori in a neighborhood of an equilibrium of a system of ordinary differential equations JO - Differencialʹnye uravneniâ PY - 2000 SP - 569 EP - 571 VL - 36 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_2000_36_4_a22/ LA - ru ID - DE_2000_36_4_a22 ER -