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@article{AM2_1977__15_136663, author = {Walter Benz}, title = {The functional equation of distance preservance in spaces over rings. {(Short} {Communication).}}, journal = {Aequationes mathematicae}, pages = {308--308}, publisher = {mathdoc}, volume = {15}, year = {1977}, zbl = {0368.39003}, url = {http://geodesic.mathdoc.fr/item/AM2_1977__15_136663/} }
Walter Benz. The functional equation of distance preservance in spaces over rings. (Short Communication).. Aequationes mathematicae, Tome 15 (1977), p. 308. http://geodesic.mathdoc.fr/item/AM2_1977__15_136663/