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@article{MZ_1965__87_170388, author = {H.K. Farahat}, title = {The multiplicative groups of a ring.}, journal = {Mathematische Zeitschrift}, pages = {378--384}, publisher = {mathdoc}, volume = {87}, year = {1965}, zbl = {0138.26803}, url = {http://geodesic.mathdoc.fr/item/MZ_1965__87_170388/} }
H.K. Farahat. The multiplicative groups of a ring.. Mathematische Zeitschrift, Tome 87 (1965), pp. 378-384. http://geodesic.mathdoc.fr/item/MZ_1965__87_170388/