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@article{MZ_1983__182_173275, author = {I. Martin Isaacs}, title = {Abelian {Normal} {Subgroups} of {M-Groups.}}, journal = {Mathematische Zeitschrift}, pages = {205--222}, publisher = {mathdoc}, volume = {182}, year = {1983}, zbl = {0512.20005}, url = {http://geodesic.mathdoc.fr/item/MZ_1983__182_173275/} }
I. Martin Isaacs. Abelian Normal Subgroups of M-Groups.. Mathematische Zeitschrift, Tome 182 (1983), pp. 205-222. http://geodesic.mathdoc.fr/item/MZ_1983__182_173275/