1. Aschbacher, M.:Finite Group Theory, Cambridge Univ. Press, 1986.
2. Artin, E.:Geometric Algebra, Interscience Publishers, New York, 1957.
3. Biliotti, M. and Korchmaros, G.: Some finite translation planes arising fromA 6-invariant ovoids of the Klein Quadric,J. Geometry 37 (1990), 29?47.
4. Conway, J. H., Curtis, R. T., Norton, S. P., Parker, R. A. and Wilson, R. A.:An Atlas of Finite Groups, Oxford University Press, 1985.
5. Charnes, C.: Quadratic Matrices and the Translation Planes of Order 52,Coding Theory, Design Theory, Group Theory, Proceedings of the Marshall Hall Conference, Wiley, New York, 1993, pp. 155?161.