%0 Journal Article %A D. I. Sharygin %T Reduction of Sobolev spaces in $\mathbb{R}^n$ to Sobolev spaces over a two-dimensional torus $T^{2n}$ %J Vestnik Moskovskogo universiteta. Matematika, mehanika %D 2002 %P 60-63 %N 3 %U http://geodesic.mathdoc.fr/item/VMUMM_2002_3_a11/ %G ru %F VMUMM_2002_3_a11