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@article{ELMA_1974__29_141146, author = {Ich-ching Hsu}, title = {On a {Cubic} {Functional} {Equation} defined on {Groups.}}, journal = {Elemente der Mathematik}, pages = {112--117}, publisher = {mathdoc}, volume = {29}, year = {1974}, zbl = {0299.39004}, url = {http://geodesic.mathdoc.fr/item/ELMA_1974__29_141146/} }
Ich-ching Hsu. On a Cubic Functional Equation defined on Groups.. Elemente der Mathematik, Tome 29 (1974), pp. 112-117. http://geodesic.mathdoc.fr/item/ELMA_1974__29_141146/