TY - JOUR AU - A. A. Ruban TI - An invariant measure for a transformation related to Perron's algorithm for $p$-adic numbers JO - Doklady Akademii Nauk PY - 1973 SP - 536 EP - 537 VL - 213 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1973_213_3_a9/ LA - ru ID - DAN_1973_213_3_a9 ER -