1. M. Aschbacher and G. Seitz.Involutions in chevalley groups over fields of even order, to appear.
2. B. Cooperstein,Some geometries associated with parabolic representations of groups of Lie type, Canad. J. Math.27 (1976), 1021–1031.
3. L. E. Dickson,Determination of all subgroups of the known simple group of order 25920, Trans. Amer. Math. Soc.5 (1904), 126–166.
4. L. E. Dickson,Linear Groups With an Exposition of Galois Field Theory, reprint of 1901 ed., Dover, New York, 1958.
5. D. E. Flesner,Maximal subgroups of PSp 4(2 n ) containing central elations or noncentral skew elations, to appear in Illnois J. Math.