@article{RSMUP_1992__88__245_0,
     author = {Mainardis, Mario},
     title = {Gruppi con pochi sottogruppi non quasinormali},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {245--261},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {88},
     year = {1992},
     mrnumber = {1209128},
     zbl = {0782.20021},
     language = {it},
     url = {http://archive.numdam.org/item/RSMUP_1992__88__245_0/}
}