TY - JOUR AU - N. V. Svanidze TI - Small perturbations of an integrable dynamical system with an integral invariant JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1980 SP - 124 EP - 146 VL - 147 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_1980_147_a8/ LA - ru ID - TM_1980_147_a8 ER -