%0 Journal Article %A Halina Swiatak %T On alternatives equivalent to the Cauchy functional equation and a related equation. %J Aequationes mathematicae %D 1981 %P 66-75 %V 23 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1981__23_136891/ %F AM2_1981__23_136891