%0 Journal Article %A Pl. Kannappan %T On a generalization of the sum form functional equation. VI %J Annales Polonici Mathematici %D 1988 %P 153-165 %V 48 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-48-2-153-165/ %R 10.4064/ap-48-2-153-165 %G en %F 10_4064_ap_48_2_153_165