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)

Bring your own device: ubiquitous approach to digital affinity diagram collaboration. - William Widjaja; Masayuki Sawamura (UbiComp Adjunct, 2014)

DADS System: Distributed Approach to Digital Affinity Diagram Collaboration. - William Widjaja; Masayuki Sawamura (CSCW Companion, 2015)

Distributed interface for group affinity-diagram brainstorming. - William Widjaja; Makoto Takahashi (Concurr. Eng. Res. Appl., 2016)