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@article{PORMA_1981__40_3_115460, author = {Haruki, Hiroshi}, title = {A generalization of {Hille's} and {Robinson's} functional equations}, journal = {Portugaliae mathematica}, pages = {335--343}, publisher = {mathdoc}, volume = {40}, number = {3}, year = {1981}, mrnumber = {0819900}, zbl = {0582.39010}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1981__40_3_115460/} }
Haruki, Hiroshi. A generalization of Hille's and Robinson's functional equations. Portugaliae mathematica, Tome 40 (1981) no. 3, pp. 335-343. http://geodesic.mathdoc.fr/item/PORMA_1981__40_3_115460/