TY - JOUR AU - V. I. Burenkov TI - Extension of functions with preservation of Sobolev seminorm JO - Informatics and Automation PY - 1985 SP - 71 EP - 85 VL - 172 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TRSPY_1985_172_a5/ LA - ru ID - TRSPY_1985_172_a5 ER -