Tracking User Participation in a Large Scale Team Collaboration Environment. - Dionysis Karaiskakis; Dimitrios Kalles; Thanasis Hadzilacos (EC-TEL Workshops, 2006)

Profiling Group Activity of Online Academic Workspaces: The Hellenic Open University Case Study. - Dionysis Karaiskakis; Dimitris Kalles; Thanasis Hadzilacos (Int. J. Web Based Learn. Teach. Technol., 2008)