TY - JOUR AU - V. I. Levenshtein TI - Perfect codes in the metric of deletions and insertions JO - Diskretnaya Matematika PY - 1991 SP - 3 EP - 20 VL - 3 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DM_1991_3_1_a0/ LA - ru ID - DM_1991_3_1_a0 ER -