@article{MZ_1965__87_170384,
     author = {Steven Bauman},
     title = {p-normality and p-length of a finite group.},
     journal = {Mathematische Zeitschrift},
     pages = {345--347},
     publisher = {mathdoc},
     volume = {87},
     year = {1965},
     zbl = {0125.28802},
     url = {http://geodesic.mathdoc.fr/item/MZ_1965__87_170384/}
}