@article{SM_1993_75_2_a9,
     author = {E. N. Selivanova},
     title = {Classification of geodesic flows of {Liouville} metrics on the two-dimensional torus up to topological equivalence},
     journal = {Sbornik. Mathematics},
     pages = {491--505},
     publisher = {mathdoc},
     volume = {75},
     number = {2},
     year = {1993},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1993_75_2_a9/}
}