TY - JOUR AU - D. V. Georgievskii TI - Isolated stable initial perturbations of unstable equilibria of some mechanical systems JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 2019 SP - 49 EP - 54 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VMUMM_2019_3_a6/ LA - ru ID - VMUMM_2019_3_a6 ER -