@article{VMUMM_1985_3_a24,
     author = {V. V. Kozlov},
     title = {Integrable cases of the problem of motion of a point over a three- dimensional sphere in a force field with fourth-degree potential},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {93--95},
     publisher = {mathdoc},
     number = {3},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1985_3_a24/}
}