@article{DAN_1973_213_3_a9,
     author = {A. A. Ruban},
     title = {An invariant measure for a transformation related to {Perron's} algorithm for $p$-adic numbers},
     journal = {Doklady Akademii Nauk},
     pages = {536--537},
     publisher = {mathdoc},
     volume = {213},
     number = {3},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_213_3_a9/}
}