%0 Journal Article %A Ryotaro Sato %T On the ratio maximal functions for an ergodic flow %J Studia Mathematica %D 1984 %P 129-139 %V 80 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-80-2-129-139/ %R 10.4064/sm-80-2-129-139 %G en %F 10_4064_sm_80_2_129_139