TY - JOUR AU - L. P. Shilnikov TI - A~contribution to the problem of the structure of an extended neighborhood of a~rough equilibrium state of saddle-focus type JO - Sbornik. Mathematics PY - 1970 SP - 91 EP - 102 VL - 10 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1970_10_1_a6/ LA - en ID - SM_1970_10_1_a6 ER -