%0 Journal Article %A Yu. N. Bibikov %T On Stability in Hamiltonian Systems with Two Degrees of Freedom %J Matematičeskie zametki %D 2014 %P 202-208 %V 95 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_2014_95_2_a2/ %G ru %F MZM_2014_95_2_a2