%0 Journal Article %A A. A. Reznik %T Sobolev spaces of functions on families of discrete sets. Trace %J Doklady Akademii Nauk %D 1988 %P 1320-1324 %V 301 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1988_301_6_a9/ %G ru %F DAN_1988_301_6_a9