@article{TVP_1980_25_3_a19,
     author = {Yu. V. Direev},
     title = {An ergodic theorem for additive functionals},
     journal = {Teori\^a vero\^atnostej i ee primeneni\^a},
     pages = {625--628},
     publisher = {mathdoc},
     volume = {25},
     number = {3},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TVP_1980_25_3_a19/}
}