finite simple group, J. Algebra 20 (1972) 540-569 and 34 (1975) 188-189. Volker Gebhardt, Two short presentations for Lyons' sporadic simple group, Experimental
群(英语:Rudvalis group) R u {\displaystyle Ru} ; 铃木散在群(英语:Suzukisporadicgroup) S u z {\displaystyle Suz} 或 F 3 − {\displaystyle F_{3-}} ; O'Nan 群(英语:O'Nan group) O