On the uniqueness of (48, 6)-arcs in PG(2, 9). - Ayako Kikui; Tatsuya Maruta; Yuri Yoshida (Adv. Math. Commun., 2009)

On optimal linear codes over F5. - Tatsuya Maruta; Maori Shinohara; Ayako Kikui (Discret. Math., 2009)