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@article{AM2_1985__29_137074, author = {Gian Luigi Forti}, title = {The general solution of a functional equation in two variables.}, journal = {Aequationes mathematicae}, pages = {7--13}, publisher = {mathdoc}, volume = {29}, year = {1985}, zbl = {0593.39007}, url = {http://geodesic.mathdoc.fr/item/AM2_1985__29_137074/} }
Gian Luigi Forti. The general solution of a functional equation in two variables.. Aequationes mathematicae, Tome 29 (1985), pp. 7-13. http://geodesic.mathdoc.fr/item/AM2_1985__29_137074/