%0 Journal Article %A I. Yu. Polekhin %T Hamiltonian systems under small nonautonomous perturbations %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 2012 %P 47-53 %N 1 %U http://geodesic.mathdoc.fr/item/VMUMM_2012_1_a7/ %G ru %F VMUMM_2012_1_a7