%0 Journal Article %A N. V. Denisova %T The structure of infinitesimal symmetries of geodesic flows on a~two-dimensional torus %J Sbornik. Mathematics %D 1997 %P 1055-1069 %V 188 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1997_188_7_a4/ %G en %F SM_1997_188_7_a4