@article{MZ_1974__139_172109,
     author = {Stewart E. Stonehewer},
     title = {Nilpotent {Residuals} of {Subnormal} {Subgroups.}},
     journal = {Mathematische Zeitschrift},
     pages = {45--54},
     publisher = {mathdoc},
     volume = {139},
     year = {1974},
     zbl = {0295.20035},
     url = {http://geodesic.mathdoc.fr/item/MZ_1974__139_172109/}
}