@article{DAN_1974_214_5_a3,
     author = {V. G. Demin and F. I. Kiselev},
     title = {A new class of periodic motions of a rigid body with one fixed point in a {Newtonian} force field},
     journal = {Doklady Akademii Nauk},
     pages = {997--998},
     publisher = {mathdoc},
     volume = {214},
     number = {5},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_214_5_a3/}
}