TY  - JOUR
AU  - Nándor Simányi
AU  - Domokos Szász
TI  - Hard ball systems are completely hyperbolic
JO  - Annals of mathematics
PY  - 1999
VL  - 149
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.2307/121019/
DO  - 10.2307/121019
ID  - 10_2307_121019
ER  -