1. Atkins, M and Blissett, G.: 1989, ?Learning activities and interactive videodisc: an exploratory study?,British Journal of Educational Technology 20(1), 47?56.
2. Butcher, P. G.: 1986, ?Computing aspects of interactive video?,Computers and Education 10 (1), 1?10.
3. Gillespie, J. and Phillips, R.: 1992, ?The use of multimedia materials for modeling in the secondary mathematics classroom?, Proceedings of Working Group 14, ICME ? 7, Quebec.
4. Hoelzl, R.: 1994, ?Pupils' solutions of a geometrical problem with the help of Cabrigéomètre', In Sutherland, R. & Mason, J. (eds)Proceedings of the NATO Advanced Workshop Exploiting Mental Imagery with Computers in Mathematics Education, Springer (in press).
5. Hoyles, C: 1990, ?Mathematics in prime time television: The story of Fun and Games?, in Howson, A. & Kahane, J.-P. (eds),The Popularisation of Mathematics, Cambridge University Press, pp. 124?135.