@article{ND_2020_16_2_a9,
     author = {A. D. Morozov and K. E. Morozov},
     title = {On {Quasi-Periodic} {Parametric} {Perturbations} of {Hamiltonian} {Systems}},
     journal = {Russian journal of nonlinear dynamics},
     pages = {369--378},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ND_2020_16_2_a9/}
}