%0 Journal Article %A R. V. Chakon %T An ergodic theorem for operators satisfying norm conditions %J Matematika %D 1963 %P 131-138 %V 7 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAT_1963_7_2_a7/ %G ru %F MAT_1963_7_2_a7