Visual CASE: A software development system for home appliances. - Yoshihiko Imai; Kazutoshi Sumiya; Kouichi Yasutake; Shuusuke Haruna (COMPSAC, 1993)

A Product Specification Database for Visual Prototyping. - Kazutoshi Sumiya; Kouichi Yasutake; Hirohiko Tanaka; Norio Sanada; Yoshihiko Imai (VLDB, 1995)