%0 Journal Article %A A. A. Kuznetsova %T A billiard realization of non-Bott singularities of integrable Hamiltonian systems with no more than one singular fiber of Seifert bundle %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 2025 %P 3-10 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_2025_2_a0/ %G ru %F VMUMM_2025_2_a0