TY  - JOUR
AU  - Norbert Hungerbühler
TI  - Geometrical Aspects of the Circular Billiard Problem.
JO  - Elemente der Mathematik
PY  - 1992
SP  - 114
EP  - 117
VL  - 47
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ELMA_1992__47_3_141533/
ID  - ELMA_1992__47_3_141533
ER  -