@article{DAN_1972_202_2_a9,
     author = {L. D. Pustyl'nikov},
     title = {Existence of a set of positive measure of oscillating motions in a certain problem of dynamics},
     journal = {Doklady Akademii Nauk},
     pages = {287--289},
     publisher = {mathdoc},
     volume = {202},
     number = {2},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_202_2_a9/}
}