E. Mugellini, O. Khaled, and M. Pettenati. EGOV (Workshops and Posters), volume 13 of Schriftenreihe Informatik, page 69-77. Universitätsverlag Rudolf Trauner, Linz, Austria, (2005)
S. Carrino, E. Mugellini, O. Khaled, and R. Ingold. Human-Computer Interaction, volume 6763 of Lecture Notes in Computer Science, page 165--174. Springer, (2011)
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, M. Pettenati, O. Khaled, and F. Pirri. E-Government: Towards Electronic Democracy, International Conference, volume 3416 of Lecture Notes in Computer Science, page 193--204. Bolzano, Italy, Springer, (March 2005)