A New Approach to Knowledge Base Management Systems. - Hidefumi Kondo; Takuo Koguchi (ISMIS, 1987)

Knowledge Representation with Abstractive Layers for Information Retrieval. - Takuo Koguchi; Hidefumi Kondo; Masahiro Oba; Hidenori Itoh (FGCS, 1988)

A Visual User Interface for a Personal Information Base using a Concept Network. - Hiromichi Fujisawa; Itsuko Kiuchi; Takuo Koguchi; Hidefumi Kondo (DASFAA, 1991)