1. Abdel-Wahab, H. M., (1990). Multiuser tools architecture for group collaboration in computer networks. Computer Communications. 13 (3), 165–169.
2. Abdel-Wahab, H. M., and Feit, M. A., (1991). XTV: A framework for sharing X Window clients in remote synchronous collaboration. Proceedings of TRICQMM'91. IEEE Conference on Communications Software: Communications for Distributed Applications and Systems. 159–167.
3. Anderson, J. R., (1978, July). Arguments concerning representations for mental imagery. Psychological Review. 85 (4): 249–277.
4. Barker, P. G., and Manji, K. A., (1987). Pictorial knowledge bases. P. of the Third Conference of the British Computer Society. Human-Computer Interaction Specialist Group. Cambridge: Cambridge University Press, pp. 163–173.
5. Barker, P. G., and Najah, M., (1985). Pictorial interfaces to data bases. International Journal of Man-Machine Studies. 23, 423–442.