%0 Journal Article %A D. V. Alekseevskii %T $S^n$ and $E^n$ are the only Riemannian spaces that admit an essential conformal transformation %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1973 %V 28 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1973_28_5_a8/ %G ru %F RM_1973_28_5_a8