%0 Journal Article %A B. L. Fain %T On an extension theorem for spaces of functions whose partial derviatives are summable to different powers ($\Omega\in R^n$) %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1987 %P 221-222 %V 180 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1987_180_a135/ %G ru %F TM_1987_180_a135