@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/