%0 Journal Article %A D. V. Georgievskii %T Isolated stable initial perturbations of unstable equilibria of some mechanical systems %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 2019 %P 49-54 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_2019_3_a6/ %G ru %F VMUMM_2019_3_a6