@article{GDZPPN002441977,
title = {Convex billiards and a theorem by E. Hops.},
journal = {Mathematische Zeitschrift},
volume = {212},
year = {1993},
pages = {147-154},
zbl = {0790.58023},
url = {http://dml.mathdoc.fr/item/GDZPPN002441977}
}
Bialy, Misha. Convex billiards and a theorem by E. Hops.. Mathematische Zeitschrift, Tome 212 (1993) pp. 147-154. http://gdmltest.u-ga.fr/item/GDZPPN002441977/