Abarbanel, R. (1993) Problem solving with and without visualization. (Ed. G. Nielsen and D. Bergeron) Proceedings of Visualization '93, 343-344. IEEE Computer Society Press: Washington.
Berlin B., Kay, P. (1969)Basic Color Terms: Their Universality and Evolution. Berkeley: University Press.
Woods, D. (1991) The cognitive engineering of problem representations. In (G. Weir and J. Alty, eds.) Human-Computer Interaction and complex systems. New York: Academic Press.