@article{MZ_1968__105_170998,
     author = {Trevor Hawkes},
     title = {On the {Class} of {Sylow} {Tower} {Groups.}},
     journal = {Mathematische Zeitschrift},
     pages = {393--398},
     publisher = {mathdoc},
     volume = {105},
     year = {1968},
     zbl = {0157.05601},
     url = {http://geodesic.mathdoc.fr/item/MZ_1968__105_170998/}
}