O. Khaled, N. Karacapilidis, Y. Rekik, and C. Vanoirbeek. 4th International Conference on Computer-Aided Learning and Instruction in Science and Engineering, page 325--333. Chalmers University of Technology, Gotheborg, Sweden, Alvegard C., (June 1998)
O. Khaled, C. Vanoirbeek, G. Coray, and M. Pettenati. Proceedings of WebNet 98 - World Conference on the WWW and Internet & Intranet, Orlando, Florida, USA, November 7-12, 1998, AACE, (November 1998)
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)
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)
C. Evangelou, N. Karacapilidis, O. Khaled, and H. Drissi. 6th European Conference on Knowledge Management, September 8-9, 2005, University of Limerick, Ireland, page 184--189. Academic Conferences Limited, Reading, UK, (2005)
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)
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)
E. Mugellini, O. Khaled, M. Pettenati, and P. Kuonen. 2005 IEEE International Conference on e-Technology, e-Commerce, and e-Services (EEE 2005), page 618--621. Hong Kong, China, IEEE Computer Society, (April 2005)
M. Sokhn, E. Mugellini, and O. Abou Khaled. (AWIC'6) - 6th Atlantic Web Intelligence Conference, volume 67 of Advances in Soft Computing series, Prague, Czech Republic, Springer, (September 2009)
D. Perroud, L. Angelini, E. Mugellini, and O. Abou Khaled. The First International Conference on Ambient Computing, Applications, Services and Technologies, page 1–6. Barcelona, Spain, (October 2011)