%0 Journal Article %A L. A. Masal'tsev %T Nil-Manifolds Cannot be Immersed as Hypersurfaces in Euclidean Spaces %J Matematičeskie zametki %D 2004 %P 868-873 %V 76 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_2004_76_6_a6/ %G ru %F MZM_2004_76_6_a6