Characterization of matrices B such that (I, B, B2) generates a digital net with t-value zero. - Hiroki Kajiura; Makoto Matsumoto; Kosuke Suzuki (Finite Fields Their Appl., 2018)

Non-existence and Construction of Pre-difference Sets, and Equi-Distributed Subsets in Association Schemes. - Hiroki Kajiura; Makoto Matsumoto; Takayuki Okuda (Graphs Comb., 2021)

Difference sets in pseudocyclic association schemes. - Hiroki Kajiura; Koji Momihara (Discret. Math., 2023)