TY  - JOUR
AU  - Rafał Kołodziej
TI  - The rotation number of some transformation related to billiards in an ellipse
JO  - Studia Mathematica
PY  - 1985
SP  - 293
EP  - 302
VL  - 81
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/sm-81-3-293-302/
DO  - 10.4064/sm-81-3-293-302
LA  - en
ID  - 10_4064_sm_81_3_293_302
ER  -