@article{VMUMM_2001_4_a13,
     author = {V. G. Vil'ke},
     title = {One model of a train},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {63--66},
     year = {2001},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2001_4_a13/}
}