@article{MZM_1984_36_2_a13,
     author = {A. A. Gura},
     title = {Horocycle flow on a surface of negative curvature is separating},
     journal = {Matemati\v{c}eskie zametki},
     pages = {279--284},
     publisher = {mathdoc},
     volume = {36},
     number = {2},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1984_36_2_a13/}
}