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@article{MZ_1970__117_171407, author = {James E. Roseblade}, title = {The {Derived} {Series} of a {Join} of {Subnormal} {Sugroups.}}, journal = {Mathematische Zeitschrift}, pages = {57--69}, publisher = {mathdoc}, volume = {117}, year = {1970}, zbl = {0224.20034}, url = {http://geodesic.mathdoc.fr/item/MZ_1970__117_171407/} }
James E. Roseblade. The Derived Series of a Join of Subnormal Sugroups.. Mathematische Zeitschrift, Tome 117 (1970), pp. 57-69. http://geodesic.mathdoc.fr/item/MZ_1970__117_171407/