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@article{MZ_1974__139_172108, author = {Toshihiko Yamada}, title = {The {Schur} {Subgroup} of a {Real} {Cyclotomic} {Field.}}, journal = {Mathematische Zeitschrift}, pages = {35--44}, publisher = {mathdoc}, volume = {139}, year = {1974}, zbl = {0278.12002}, url = {http://geodesic.mathdoc.fr/item/MZ_1974__139_172108/} }
Toshihiko Yamada. The Schur Subgroup of a Real Cyclotomic Field.. Mathematische Zeitschrift, Tome 139 (1974), pp. 35-44. http://geodesic.mathdoc.fr/item/MZ_1974__139_172108/