@article{VMUMM_1996_4_a19,
     author = {A. V. Penskoi},
     title = {Discrete {Lagrangian} systems on the {Virasoro} group},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {99--102},
     publisher = {mathdoc},
     number = {4},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1996_4_a19/}
}