%0 Journal Article %A Fulvia Skof %T On two conditional forms of the equation ||f(x + y)|| = ||f(x) + f(y)||. (Summary). %J Aequationes mathematicae %D 1993 %P 122-122 %V 45 %N 2-3 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1993__45_2-3_182452/ %F AM2_1993__45_2-3_182452