@article{SM_1974_23_1_a2,
     author = {L. A. Bunimovich},
     title = {On billiards close to dispersing},
     journal = {Sbornik. Mathematics},
     pages = {45--67},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {1974},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1974_23_1_a2/}
}