TY - JOUR AU - A. I. Zhivkov TI - Geometry of invariant manifolds of a gyroscope in the field of a quadratic potential JO - Izvestiya. Mathematics PY - 1991 SP - 227 EP - 242 VL - 37 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IM2_1991_37_1_a9/ LA - en ID - IM2_1991_37_1_a9 ER -