Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1980_28_1_a18, author = {Yu. V. Direev}, title = {Ergodic theorem for additive functionals}, journal = {Matemati\v{c}eskie zametki}, pages = {153--158}, publisher = {mathdoc}, volume = {28}, number = {1}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1980_28_1_a18/} }
Yu. V. Direev. Ergodic theorem for additive functionals. Matematičeskie zametki, Tome 28 (1980) no. 1, pp. 153-158. http://geodesic.mathdoc.fr/item/MZM_1980_28_1_a18/