%0 Journal Article %A O. V. Kholostova %T On multiple fourth-order resonances in a nonautonomous two-degree-of-freedom Hamiltonian system %J Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹûternye nauki %D 2019 %P 275-294 %V 29 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/VUU_2019_29_2_a9/ %G ru %F VUU_2019_29_2_a9