%0 Journal Article %A M. G. Yumagulov %A L. S. Ibragimova %A A. S. Belova %T Perturbation theory methods in problem of parametric resonance for linear periodic Hamiltonian systems %J Ufa mathematical journal %D 2021 %P 174-190 %V 13 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/UFA_2021_13_3_a12/ %G en %F UFA_2021_13_3_a12