@article{AIF_2005__55_1_29_0,
     author = {Troubetzkoy, Serge},
     title = {Periodic billiard orbits in right triangles},
     journal = {Annales de l'Institut Fourier},
     pages = {29--46},
     publisher = {Association des Annales de l{\textquoteright}institut Fourier},
     volume = {55},
     number = {1},
     year = {2005},
     doi = {10.5802/aif.2088},
     mrnumber = {2141287},
     zbl = {1063.37022},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/aif.2088/}
}