Geometry of Sporadic Groups: Volume 2, Representations and ...
A. A. Ivanov
A.A. Ivanov and D.V. Pasechnik, c-extensions of the F4(2)-building, Preprint 00P/ 005, Imperial College, 2000. A.A. Ivanov, D.V. Pasechnik and S.V. Shpectorov, Non-abelian representations of some sporadic geometries, J. Algebra 181 (1996) , ...