@article{VUU_2019_29_2_a9,
     author = {O. V. Kholostova},
     title = {On multiple fourth-order resonances in a nonautonomous two-degree-of-freedom {Hamiltonian} system},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {275--294},
     publisher = {mathdoc},
     volume = {29},
     number = {2},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2019_29_2_a9/}
}