@article{RM_1987_42_3_a5,
     author = {Ya. G. Sinai and N. I. Chernov},
     title = {Ergodic properties of certain systems of two-dimensional discs and three-dimensional balls},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {181--207},
     publisher = {mathdoc},
     volume = {42},
     number = {3},
     year = {1987},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1987_42_3_a5/}
}