@article{TSG_1995-1996__14__109_0,
     author = {Gutkin, Eug\`ene},
     title = {Billards en polygones et groupes fuchsiens},
     journal = {S\'eminaire de th\'eorie spectrale et g\'eom\'etrie},
     pages = {109--120},
     publisher = {Institut Fourier},
     address = {Grenoble},
     volume = {14},
     year = {1995-1996},
     mrnumber = {1721310},
     zbl = {0910.30035},
     language = {fr},
     url = {http://www.numdam.org/item/TSG_1995-1996__14__109_0/}
}