@article{MZ_1976__147_172341,
     author = {Peter Schmid},
     title = {Normal {p-Subgroups} in the {Group} of {Outer} {Automorphisms} of a {Finite} {p-Group.}},
     journal = {Mathematische Zeitschrift},
     pages = {271--278},
     year = {1976},
     volume = {147},
     zbl = {0307.20016},
     url = {http://geodesic.mathdoc.fr/item/MZ_1976__147_172341/}
}