%0 Journal Article %A R. Sato %T An ergodic theorem without invariant measure %J Colloquium Mathematicum %D 1990 %P 59-62 %V 59 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-59-1-59-62/ %R 10.4064/cm-59-1-59-62 %G en %F 10_4064_cm_59_1_59_62