1. Book Review of "An Algebraic Approach to Association Schemes" (author: Paul-Hermann Zieschang, Lecture Notes in Mathematics 1628, Springer), Bull. London Math. Soc. 31 (1999), 373-374.
2. The Geometry of Orthogonal Groups over Finite Fields, JSPS-DOST Lecture Notes in Mathematics 3 (1996), Sophia University. pdf file

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