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@article{AM2_1985__28_137044, author = {John Lawrence}, title = {The stability of multiplicative semigroup homomorphisms to real normed algebras, {I.}}, journal = {Aequationes mathematicae}, pages = {94--101}, publisher = {mathdoc}, volume = {28}, year = {1985}, zbl = {0594.46047}, url = {http://geodesic.mathdoc.fr/item/AM2_1985__28_137044/} }
John Lawrence. The stability of multiplicative semigroup homomorphisms to real normed algebras, I.. Aequationes mathematicae, Tome 28 (1985), pp. 94-101. http://geodesic.mathdoc.fr/item/AM2_1985__28_137044/