Lü GongCao Hong-pingGuiyun Chen
Finite nilpotent groups having exactly four conjugacy classes of non-normal subgroups are classified.
Gustavo A. Fernández‐AlcoberLeire Legarreta
Rolf BrandlZahra RezazadehBijan Taerı
Leonid A. KurdachenkoAlessio RussoGiovanni VincenziJavier Otal Cinca
Leonid A. KurdachenkoJavier OtalAlessio RussoGiovanni Vincenzi