%0 Journal Article %A Wojciech Chojnacki %T On some functional equation generalizing Cauchy's and d'Alembert's functional equations %J Colloquium Mathematicum %D 1987 %P 169-178 %V 55 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-55-1-169-178/ %R 10.4064/cm-55-1-169-178 %G en %F 10_4064_cm_55_1_169_178