@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/