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@article{AM2_1971__6_136189, author = {J. PFANZAGL}, title = {On the {Functional} {Equation} ... (x) + ... (y) = {v(T(x,} y))}, journal = {Aequationes mathematicae}, pages = {202--205}, publisher = {mathdoc}, volume = {6}, year = {1971}, url = {http://geodesic.mathdoc.fr/item/AM2_1971__6_136189/} }
J. PFANZAGL. On the Functional Equation ... (x) + ... (y) = v(T(x, y)). Aequationes mathematicae, Tome 6 (1971), pp. 202-205. http://geodesic.mathdoc.fr/item/AM2_1971__6_136189/