@article{ND_2024_20_4_a4,
     author = {O. V. Kholostova},
     title = {On {Periodic} {Motions} of a {Nonautonomous} {Hamiltonian} {System} at {Resonance} 2:1:1},
     journal = {Russian journal of nonlinear dynamics},
     pages = {493--511},
     publisher = {mathdoc},
     volume = {20},
     number = {4},
     year = {2024},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ND_2024_20_4_a4/}
}