Improvement of binary digital search trees using hierarchical structures. - Masami Shishibori; Satoshi Kiyohara; Jun-ichi Aoe (Syst. Comput. Jpn., 1997)

Multi Screen Environment with a Motion Base. - Haruo Takeda; Satoshi Kiyohara; Kunihiro Chihara; Hiroshi Kawase; Yuji Matsuda; Masami Yamasaki (Virtual Worlds, 2000)