Frame-Axis Model for Automatic Information Organizing and Spatial Navigation. - Yoshihiro Masuda; Yasuhiro Ishitobi; Manabu Ueda (ECHT, 1994)

Development of a Related Document Retrieval System and Evaluation of the System Using NTCIR-1. - Hiroshi Umemoto; Tsutomu Kuramochi; Yasuhiro Ishitobi; Masakazu Tateno (NTCIR, 1999)