TY - JOUR AU - A. I. Korobko TI - The density principle and approximation of perturbed inclusions JO - Izvestiya Instituta Matematiki i Informatiki Udmurtskogo Gosudarstvennogo Universiteta PY - 2006 SP - 69 EP - 70 VL - 37 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IIMI_2006_37_3_a30/ LA - ru ID - IIMI_2006_37_3_a30 ER -