TY - JOUR AU - L. D. Pustyl'nikov TI - Existence of a set of positive measure of oscillating motions in a certain problem of dynamics JO - Doklady Akademii Nauk PY - 1972 SP - 287 EP - 289 VL - 202 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1972_202_2_a9/ LA - ru ID - DAN_1972_202_2_a9 ER -