@article{VMUMM_1998_2_a10,
     author = {N. V. Denisova},
     title = {Polynomial fields of third degree symmetries of geodesic flows on a two-dimensional torus},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {48--53},
     publisher = {mathdoc},
     number = {2},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1998_2_a10/}
}