%0 Journal Article %A Florence Gouli-Andreou %T On a Riemannian Manifold M with Structures Defined by Nilpotent Operators %J Ευκλείδης Γ %D 1989 %P 21-30 %V 21 %I mathdoc %U http://geodesic.mathdoc.fr/item/EUG_1989__21_a2/ %G gr %F EUG_1989__21_a2