@article{VMUMM_1991_3_a10,
     author = {V. G. Vil'ke},
     title = {On a method of motion separation and averaging},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {49--56},
     publisher = {mathdoc},
     number = {3},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1991_3_a10/}
}