@article{1104159472,
author = {Katok, A.},
title = {The growth rate for the number of singular and periodic orbits for a polygonal billiard},
journal = {Comm. Math. Phys.},
volume = {108},
number = {1},
year = {1987},
pages = { 151-160},
language = {en},
url = {http://dml.mathdoc.fr/item/1104159472}
}
Katok, A. The growth rate for the number of singular and periodic orbits for a polygonal billiard. Comm. Math. Phys., Tome 108 (1987) no. 1, pp. 151-160. http://gdmltest.u-ga.fr/item/1104159472/