%0 Journal Article %A N. V. Denisova %T Polynomial fields of third degree symmetries of geodesic flows on a two-dimensional torus %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 1998 %P 48-53 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/VMUMM_1998_2_a10/ %G ru %F VMUMM_1998_2_a10