%0 Journal Article %A S. I. Fedishchenko %T Infinitely small transformations preserving the curvature of a Riemannian space %J Matematičeskie zametki %D 1969 %P 371-380 %V 6 %N 4 %U http://geodesic.mathdoc.fr/item/MZM_1969_6_4_a1/ %G ru %F MZM_1969_6_4_a1