On Certain Schur Rings of Dimension 4. - Kenzi Akiyama (Des. Codes Cryptogr., 2001)

On I's. - Kenzi Akiyama; Chihiro Suetake (Discret. Math., 2008)

On projective planes of order 12 with a collineation group of order 9. - Kenzi Akiyama; Chihiro Suetake (Australas. J Comb., 2009)

On STD6[18, 3]'s and STD7[21, 3]'s Admitting a Semiregular Automorphism Group of Order 9. - Kenzi Akiyama; Masayuki Ogawa; Chihiro Suetake (Electron. J. Comb., 2009)

The nonexistence of projective planes of order 12 with a collineation group of order 9. - Kenzi Akiyama; Chihiro Suetake; Masaki Tanaka (Australas. J Comb., 2019)