%0 Journal Article %A Haruki, Hiroshi %T A generalization of Hille's and Robinson's functional equations %J Portugaliae mathematica %D 1981 %P 335-343 %V 40 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1981__40_3_115460/ %G en %F PORMA_1981__40_3_115460