%0 Journal Article %A Florence Gouli-Andreou %T On a Riemannian Manifold M with Structures Defined by Nilpotent Operators %J Μαθηματική Επιθεώρηση %D 1981 %P 21-30 %V 21 %I mathdoc %U http://geodesic.mathdoc.fr/item/MR_1981__21_a2/ %G gr %F MR_1981__21_a2