TY - JOUR AU - M. G. Chebunin AU - A. P. Kovalevskii TI - Limit theorems for forward and backward processes of numbers of non-empty urns in infinite urn schemes JO - Sibirskie èlektronnye matematičeskie izvestiâ PY - 2023 SP - 913 EP - 922 VL - 20 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SEMR_2023_20_2_a27/ LA - ru ID - SEMR_2023_20_2_a27 ER -