@article{IM2_1988_31_2_a4,
     author = {L. D. Pustyl'nikov},
     title = {On~oscillatory motions in a~certain dynamical system},
     journal = {Izvestiya. Mathematics },
     pages = {325--347},
     publisher = {mathdoc},
     volume = {31},
     number = {2},
     year = {1988},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1988_31_2_a4/}
}