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@article{AM2_1987__32_137177, author = {Walter Benz}, title = {The cardinality of the set of discontinuous solutions of a class of functional equations.}, journal = {Aequationes mathematicae}, pages = {58--62}, publisher = {mathdoc}, volume = {32}, year = {1987}, zbl = {0616.39003}, url = {http://geodesic.mathdoc.fr/item/AM2_1987__32_137177/} }
Walter Benz. The cardinality of the set of discontinuous solutions of a class of functional equations.. Aequationes mathematicae, Tome 32 (1987), pp. 58-62. http://geodesic.mathdoc.fr/item/AM2_1987__32_137177/