@article{TRSPY_2015_289_a16,
     author = {D. V. Treschev},
     title = {On a conjugacy problem in billiard dynamics},
     journal = {Informatics and Automation},
     pages = {309--317},
     publisher = {mathdoc},
     volume = {289},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2015_289_a16/}
}