@article{RSMUP_1993__89__47_0,
     author = {Beidleman, James C. and Smith, Howard},
     title = {On non-supersoluble and non-polycyclic normal subgroups},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {47--56},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {89},
     year = {1993},
     mrnumber = {1229042},
     zbl = {0802.20031},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_1993__89__47_0/}
}