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O. Khaled, N. Karacapilidis, Y. Rekik, и C. Vanoirbeek. 4th International Conference on Computer-Aided Learning and Instruction in Science and Engineering, стр. 325--333. Chalmers University of Technology, Gotheborg, Sweden, Alvegard C., (июня 1998)
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E. Mugellini, O. Khaled, и M. Pettenati. Electronic Government - Workshop and Poster Proceedings of the Fourth International EGOV Conference 2005, August 22-26, 2005, Copenhagen, Denmark, том 13 из Schriftenreihe Informatik, стр. 69--77. Universitätsverlag Rudolf Trauner, Linz, Austria, (2005)
E. Mugellini, E. Rubegni, S. Gerardi, и O. Khaled. Proceedings of the 1st International Conference on Tangible and Embedded Interaction 2007, стр. 231--238. Baton Rouge, Louisiana, USA, ACM, (февраля 2007)
M. Sokhn, E. Mugellini, и O. Khaled. Proceedings of the 21st International Conference on Software Engineering & Knowledge Engineering, стр. 709--714. Boston, Massachusetts, USA, Knowledge Systems Institute Graduate School, (июля 2009)
S. Carrino, E. Mugellini, O. Khaled, и {. Schuler. (Smartevent '09) - The future of digital security technologies, e-Smart, Sophia-Antipolis, French Riviera, France, (сентября 2009)