1. Berners-Lee, T., Cailliau, R., Luotonen, A., Nielsen, H. F., &Secret, A. (1994).The World-Wide Web.Communications of the ACM,37 (8), August, 76–82.
2. Boehm, B.W. (1981).Software engineering economics.Englewood Cliffs:Prentice-Hall.
3. Campbell, B., &Goodman, J.M. (1988).HAM: A general purpose hypertext abstract machine.Communications of the ACM, 31(7), July, 856–861.
4. Delisle, N.M., &Schwartz, M.D. (1987).Contexts- A partitioning concept for hypertext.ACM Transactions on Office Information Systems,5 (2), April, 168–186.
5. Díaz, P. (1995).Modelo abstracto para el desarrollo de sistemas hipermediales seguros.Doctoral Theses. Department of Lenguajes y Sistemas Informáticos e Ingeniería de Software, Universidad Politécnica de Madrid, Madrid, Spain.