@article{GDZPPN002395517, title = {p-normality and p-length of a finite group.}, journal = {Mathematische Zeitschrift}, volume = {87}, year = {1965}, pages = {345-347}, zbl = {0125.28802}, url = {http://dml.mathdoc.fr/item/GDZPPN002395517} }
Bauman, Steven. p-normality and p-length of a finite group.. Mathematische Zeitschrift, Tome 87 (1965) pp. 345-347. http://gdmltest.u-ga.fr/item/GDZPPN002395517/