TY - JOUR AU - R. V. Chakon TI - An ergodic theorem for operators satisfying norm conditions JO - Matematika PY - 1963 SP - 131 EP - 138 VL - 7 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MAT_1963_7_2_a7/ LA - ru ID - MAT_1963_7_2_a7 ER -