Topic Detection from Blog Documents Using Users' Interests. - Yuichiro Sekiguchi; Harumi Kawashima; Hidenori Okuda; Masahiro Oku (MDM, 2006)

Trend-based Document Clustering for Sensitive and Stable Topic Detection. - Yoshihide Sato; Harumi Kawashima; Hidenori Okuda; Masahiro Oku (PACLIC, 2008)