F. Paganelli, O. Khaled, M. Pettenati, and D. Giuli. Web Engineering - 4th International Conference, ICWE 2004, Munich, Germany, July 26-30, 2004, Proceedings, volume 3140 of Lecture Notes in Computer Science, page 589--590. Springer, (2004)
E. Mugellini, O. Khaled, and M. Pettenati. Electronic Government - Workshop and Poster Proceedings of the Fourth International EGOV Conference 2005, August 22-26, 2005, Copenhagen, Denmark, volume 13 of Schriftenreihe Informatik, page 69--77. Universitätsverlag Rudolf Trauner, Linz, Austria, (2005)
S. Carrino, E. Mugellini, O. Khaled, and R. Ingold. HCI International 2011, 14th International Conference on Human-Computer Interaction, Hilton Orlando Bonnet Creek, Orlando, Florida, USA., (July 2011)
A. Boukottaya, C. Vanoirbeek, F. Paganelli, and O. Khaled. Conceptual Modelling 2004, First Asia-Pacific Conference on Conceptual Modelling (APCCM2004), Dunedin, New Zealand, January 18-22, 2004, volume 31 of CRPIT, page 81--90. Australian Computer Society, (2004)