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@article{MZ_1974__140_172133, author = {Daniel Segal}, title = {Normal {Subgroups} of {Finitary} {Permutation} {Groups.}}, journal = {Mathematische Zeitschrift}, pages = {81--86}, publisher = {mathdoc}, volume = {140}, year = {1974}, zbl = {0279.20003}, url = {http://geodesic.mathdoc.fr/item/MZ_1974__140_172133/} }
Daniel Segal. Normal Subgroups of Finitary Permutation Groups.. Mathematische Zeitschrift, Tome 140 (1974), pp. 81-86. http://geodesic.mathdoc.fr/item/MZ_1974__140_172133/