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@article{MZ_1974__140_172142, author = {Robert Sandling}, title = {Group {Rings} of {Circle} and {Unit} {Groups.}}, journal = {Mathematische Zeitschrift}, pages = {195--202}, publisher = {mathdoc}, volume = {140}, year = {1974}, zbl = {0281.20004}, url = {http://geodesic.mathdoc.fr/item/MZ_1974__140_172142/} }
Robert Sandling. Group Rings of Circle and Unit Groups.. Mathematische Zeitschrift, Tome 140 (1974), pp. 195-202. http://geodesic.mathdoc.fr/item/MZ_1974__140_172142/