@article{MZ_1972__126_171721,
     author = {M.F. Newman},
     title = {The {Soluble} {Length} of {Soluble} {Linear} {Groups.}},
     journal = {Mathematische Zeitschrift},
     pages = {59--70},
     publisher = {mathdoc},
     volume = {126},
     year = {1972},
     zbl = {0223.20055},
     url = {http://geodesic.mathdoc.fr/item/MZ_1972__126_171721/}
}