@article{GDZPPN002425610, title = {Normal Subgroups of N.E.C. Groups.}, journal = {Mathematische Zeitschrift}, volume = {177}, year = {1981}, pages = {331-342}, zbl = {0451.20047}, url = {http://dml.mathdoc.fr/item/GDZPPN002425610} }
Bujalance, Emilio. Normal Subgroups of N.E.C. Groups.. Mathematische Zeitschrift, Tome 177 (1981) pp. 331-342. http://gdmltest.u-ga.fr/item/GDZPPN002425610/