@article{MZ_1973__131_171882,
     author = {F. Peter Lockett},
     title = {On the {Theory} of {Fitting} {Classes} of {Finite} {Soluble} {Groups.}},
     journal = {Mathematische Zeitschrift},
     pages = {103--116},
     year = {1973},
     volume = {131},
     zbl = {0243.20015},
     url = {http://geodesic.mathdoc.fr/item/MZ_1973__131_171882/}
}