1. Ali, M.F. and Pérez-Quiñones, M.A., Using Task Models to Generate Multi-Platform User Interfaces While Ensuring Usability, in Proceedings of ACM International Conference on Human Factors in Computing Systems CHI’2002 (Minneapolis, 20–25 April 2002), Extended Abstracts, ACM Press, New York, 2002, pp. 670–671.
2. ANSI/NISO, Specifications for the Digital Talking Book, ANSI/NISO Z39.86-2002, Use and Maintenance, 2002, accessible at http://www.loc.gov/nls/z3986/v100/index.html.
3. Blattner, M.M., Sumikawa, D.A., and Greenberg, R.M., Earcons and Icons: Their Structure and Common Design Principles, Human-Computer Interaction, Vol. 4, 1989, pp. 11–44.
4. Lecture Notes in Computer Science;G. Calvary,2001
5. Carriço, L., Guimarães N., Duarte, C., Chambel, T. and Simões, H., Spoken Books: Multimodal Interaction and Information Repurposing, in Jacko, J., Stephanidis, C. (eds.), Proc. of 10th Int. Conf. on Human-Computer Interaction HCI International’2003 (Heraklion, 22–27 June 2003), Vol. 1, Lawrence Erlbaum Associates, Mahwah, 2003.