@article{RSMUP_1980__63__285_0,
     author = {Stonehewer, Stewart E.},
     title = {Subnormal composition factors of infinite groups},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {285--294},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {63},
     year = {1980},
     mrnumber = {605799},
     zbl = {0456.20015},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1980__63__285_0/}
}