%0 Journal Article
%A Fulvia Skof
%T On two conditional forms of the equation ||f(x + y)|| = ||f(x) + f(y)||.
%J Aequationes mathematicae
%D 1993
%P 167-178
%V 45
%N 2-3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM2_1993__45_2-3_137519/
%F AM2_1993__45_2-3_137519