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@article{GFA_1992__2_1_58107, author = {W.A. Veech}, title = {The {Billiard} in a {Regular} {Polygon.}}, journal = {Geometric and functional analysis}, pages = {341--380}, publisher = {mathdoc}, volume = {2}, number = {1}, year = {1992}, zbl = {0760.58036}, url = {http://geodesic.mathdoc.fr/item/GFA_1992__2_1_58107/} }
W.A. Veech. The Billiard in a Regular Polygon.. Geometric and functional analysis, Tome 2 (1992) no. 1, pp. 341-380. http://geodesic.mathdoc.fr/item/GFA_1992__2_1_58107/