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@article{AM2_1990__39_2-3_137340, author = {C.T. Ng}, title = {Jensen's functional equation on groups.}, journal = {Aequationes mathematicae}, pages = {85--99}, publisher = {mathdoc}, volume = {39}, number = {2-3}, year = {1990}, zbl = {0688.39007}, url = {http://geodesic.mathdoc.fr/item/AM2_1990__39_2-3_137340/} }
C.T. Ng. Jensen's functional equation on groups.. Aequationes mathematicae, Tome 39 (1990) no. 2-3, pp. 85-99. http://geodesic.mathdoc.fr/item/AM2_1990__39_2-3_137340/