@article{MAT_1963_7_2_a7,
     author = {R. V. Chakon},
     title = {An ergodic theorem for operators satisfying norm conditions},
     journal = {Matematika},
     pages = {131--138},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1963_7_2_a7/}
}