@article{MAN_1933__107_159599,
     author = {B. Neumann},
     title = {Die {Automorphismengruppe} der freien {Gruppen}},
     journal = {Mathematische Annalen},
     pages = {367--386},
     publisher = {mathdoc},
     volume = {107},
     year = {1933},
     zbl = {0005.24402},
     url = {http://geodesic.mathdoc.fr/item/MAN_1933__107_159599/}
}