Discusys: Multiple User Real-time Digital Sticky-note Affinity-diagram Brainstorming System. - William Widjaja; Keito Yoshii; Kiyokazu Haga; Makoto Takahashi (KES, 2013)

Efficient Group Discussion with Digital Affinity Diagram System (DADS). - William Widjaja; Keito Yoshii; Makoto Takahashi (CDVE, 2014)