%0 Journal Article %A A. A. Ruban %T An invariant measure for a transformation related to Perron's algorithm for $p$-adic numbers %J Doklady Akademii Nauk %D 1973 %P 536-537 %V 213 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1973_213_3_a9/ %G ru %F DAN_1973_213_3_a9