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@article{JRAM_1974__0268_0269_151471, author = {Emma Lehmer}, title = {On the quartic character of quadratic units.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {294--301}, publisher = {mathdoc}, volume = {0268_0269}, year = {1974}, zbl = {0289.12007}, url = {http://geodesic.mathdoc.fr/item/JRAM_1974__0268_0269_151471/} }
Emma Lehmer. On the quartic character of quadratic units.. Journal für die reine und angewandte Mathematik, 0268_0269 (1974), pp. 294-301. http://geodesic.mathdoc.fr/item/JRAM_1974__0268_0269_151471/