%0 Journal Article
%A V. T. Videv
%T Two Curvature Operators in Riemannian and Lorentzian Geometry
%J Mathematica balkanica
%D 2001
%P 7
%V 15
%N 1-2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MABA_2001_15_1-2_a1/
%F MABA_2001_15_1-2_a1