TY  - JOUR
AU  - Ryotaro Sato
TI  - On a ratio ergodic theorem
JO  - Studia Mathematica
PY  - 1987
SP  - 47
EP  - 52
VL  - 87
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/sm-87-1-47-52/
DO  - 10.4064/sm-87-1-47-52
LA  - en
ID  - 10_4064_sm_87_1_47_52
ER  -