@article{VUU_2019_29_2_a7,
     author = {A. P. Markeev},
     title = {On periodic motions of a rigid body suspended on a thread in a uniform gravity field},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {245--260},
     year = {2019},
     volume = {29},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2019_29_2_a7/}
}