@article{GDZPPN002050137, title = {On billiard arcs}, journal = {Beitr\"age zur Algebra und Geometrie = Contributions to algebra and geometry}, volume = {30}, year = {1990}, pages = {155-166}, url = {http://dml.mathdoc.fr/item/GDZPPN002050137} }
Bezdek, K. On billiard arcs. Beiträge zur Algebra und Geometrie = Contributions to algebra and geometry, Tome 30 (1990) pp. 155-166. http://gdmltest.u-ga.fr/item/GDZPPN002050137/