@article{1104274522, author = {Gutkin, Eugene and Katok, Anatole}, title = {Caustics for inner and outer billiards}, journal = {Comm. Math. Phys.}, volume = {166}, number = {3}, year = {1995}, pages = { 101-133}, language = {en}, url = {http://dml.mathdoc.fr/item/1104274522} }
Gutkin, Eugene; Katok, Anatole. Caustics for inner and outer billiards. Comm. Math. Phys., Tome 166 (1995) no. 3, pp. 101-133. http://gdmltest.u-ga.fr/item/1104274522/