%0 Journal Article %A A. V. Borisov %A I. S. Mamaev %T Isomorphisms of geodesic flows on quadrics %J Russian journal of nonlinear dynamics %D 2009 %P 145-158 %V 5 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/ND_2009_5_2_a0/ %G ru %F ND_2009_5_2_a0