@article{GDZPPN000461547,
title = {The Billiard in a Regular Polygon.},
journal = {Geometric and functional analysis},
volume = {2},
year = {1992},
pages = {341-380},
zbl = {0760.58036},
url = {http://dml.mathdoc.fr/item/GDZPPN000461547}
}
Veech, W.A. The Billiard in a Regular Polygon.. Geometric and functional analysis, Tome 2 (1992) pp. 341-380. http://gdmltest.u-ga.fr/item/GDZPPN000461547/