1. Flag structures on Tits geometries;Aschbacher;Geom. Dedicata,1983
2. The existence ofJ3E6;Aschbacher;Geom. Dedicata,1990
3. Two new sporadic semibiplanes related toM22;Baumeister;European J. Combin.,1994
4. F. Buekenhout, A geometry for the third group of Janko
5. Foundations of incidence geometry;Buekenhout,1995