Development of the Digital Portfolio Environment for both PC and PDA clients. - Kenji Matsuura; Keiji Niki; Masahiko Katayama; Yoneo Yano (WMTE, 2005)

Multi-step Annotation to Promote Reflective Learning with a Mobile Phone. - Naka Gotoda; Kenji Matsuura; Kazuhide Kanenishi; Keiji Niki; Yoneo Yano (ICCE, 2006)

Supporting multi-step annotation to promote reflective learning: triggered by a cell-phone. - Kenji Matsuura; Naka Gotoda; Keiji Niki; Kazuhide Kanenishi; Yoneo Yano (Int. J. Mob. Learn. Organisation, 2008)