TY - JOUR AU - T. D. Kozlovskaya TI - Union of $U_r$-sets for the system of characters of the group of $p$-adic numbers JO - Vestnik Moskovskogo universiteta. Matematika, mehanika PY - 2019 SP - 42 EP - 46 IS - 4 UR - http://geodesic.mathdoc.fr/item/VMUMM_2019_4_a5/ LA - ru ID - VMUMM_2019_4_a5 ER -