%0 Journal Article %A J. PFANZAGL %A G. LAUBE %T A Remark on the Functional Equation ... (xi) = .... %J Aequationes mathematicae %D 1971 %P 241-242 %V 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1971__6_136195/ %F AM2_1971__6_136195