%0 Journal Article %A R.G. Laha %A E. Lukacs %T On a functional equation which occurs in a characterization problem. %J Aequationes mathematicae %D 1977 %P 259-274 %V 16 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1977__16_136698/ %F AM2_1977__16_136698