@article{VMUMM_1990_4_a13,
     author = {V. V. Kozlov},
     title = {Vortex theory of a top},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {56--62},
     publisher = {mathdoc},
     number = {4},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1990_4_a13/}
}