%0 Journal Article
%A Letizia Brunetti
%T An Osserman-type condition on $g.f.f$-manifolds with Lorentz metric
%J Annales Polonici Mathematici
%D 2014
%P 123-141
%V 110
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/ap110-2-3/
%R 10.4064/ap110-2-3
%G en
%F 10_4064_ap110_2_3