@article{AIHPA_1998__68_4_421_0,
     author = {Bunimovich, Leonid A. and Rehacek, Jan},
     title = {On the ergodicity of many-dimensional focusing billiards},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {421--448},
     publisher = {Gauthier-Villars},
     volume = {68},
     number = {4},
     year = {1998},
     mrnumber = {1634311},
     zbl = {0907.58037},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1998__68_4_421_0/}
}