%0 Journal Article %A V. I. Burenkov %T Extension of functions with preservation of Sobolev seminorm %J Informatics and Automation %D 1985 %P 71-85 %V 172 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1985_172_a5/ %G ru %F TRSPY_1985_172_a5