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@article{MZ_1993__214_1_174561, author = {Misha Bialy}, title = {Convex billiards and a theorem by {E.} {Hops.}}, journal = {Mathematische Zeitschrift}, pages = {147--154}, publisher = {mathdoc}, volume = {214}, number = {1}, year = {1993}, zbl = {0790.58023}, url = {http://geodesic.mathdoc.fr/item/MZ_1993__214_1_174561/} }
Misha Bialy. Convex billiards and a theorem by E. Hops.. Mathematische Zeitschrift, Tome 214 (1993) no. 1, pp. 147-154. http://geodesic.mathdoc.fr/item/MZ_1993__214_1_174561/