An advanced 2.45 GHz radio communication system for automatic passenger gates. - Ken-ichi Konno; Toshiyuki Haga; Takayo Kojima (VTC, 1994)

A Method for Creating Mosaic Images Using Voronoi Diagrams. - Yoshinori Dobashi; Toshiyuki Haga; Henry Johan; Tomoyuki Nishita (Eurographics (Short Presentations), 2002)