@article{TRSPY_2016_295_a3,
     author = {S. V. Bolotin},
     title = {Degenerate billiards},
     journal = {Informatics and Automation},
     pages = {53--71},
     publisher = {mathdoc},
     volume = {295},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2016_295_a3/}
}