@article{RSMUP_1987__77__177_0,
     author = {Casolo, Carlo},
     title = {Groups with subnormal subgroups of bounded defect},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {177--187},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {77},
     year = {1987},
     mrnumber = {904619},
     zbl = {0621.20012},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1987__77__177_0/}
}