@article{MZM_1975_18_5_a4,
     author = {B. V. Levin and N. M. Timofeev},
     title = {The analogue of the law of large numbers for additive functions on sparse sets},
     journal = {Matemati\v{c}eskie zametki},
     pages = {687--698},
     publisher = {mathdoc},
     volume = {18},
     number = {5},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1975_18_5_a4/}
}