@article{GDZPPN002415070, title = {Normal Subgroups of Finitary Permutation Groups.}, journal = {Mathematische Zeitschrift}, volume = {136}, year = {1974}, pages = {81-86}, zbl = {0279.20003}, url = {http://dml.mathdoc.fr/item/GDZPPN002415070} }
Segal, Daniel. Normal Subgroups of Finitary Permutation Groups.. Mathematische Zeitschrift, Tome 136 (1974) pp. 81-86. http://gdmltest.u-ga.fr/item/GDZPPN002415070/