@article{RSMUP_1992__87__93_0,
     author = {Casolo, Carlo},
     title = {Wielandt series and defects of subnormal subgroups in finite soluble groups},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {93--104},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {87},
     year = {1992},
     mrnumber = {1183904},
     zbl = {0794.20027},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_1992__87__93_0/}
}