%0 Journal Article %A G. V. Belozerov %T Topology of $5$-surfaces of a 3D billiard inside a triaxial ellipsoid with Hooke's potential %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 2022 %P 21-31 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_2022_6_a3/ %G ru %F VMUMM_2022_6_a3