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@article{AM2_1985__28_137046, author = {S.L. Segal}, title = {On {Nathanson's} functional equation.}, journal = {Aequationes mathematicae}, pages = {114--123}, publisher = {mathdoc}, volume = {28}, year = {1985}, zbl = {0561.39001}, url = {http://geodesic.mathdoc.fr/item/AM2_1985__28_137046/} }
S.L. Segal. On Nathanson's functional equation.. Aequationes mathematicae, Tome 28 (1985), pp. 114-123. http://geodesic.mathdoc.fr/item/AM2_1985__28_137046/