@article{VMUMM_1982_3_a21,
     author = {V. V. Kozlov},
     title = {Dynamics of systems with non-integrable {restrictions.~I}},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {92--100},
     year = {1982},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1982_3_a21/}
}