1. Apple Computer, Macintosh human interface guidelines. Addison-Wesley, Reading (1992)
2. Aristotle: The complete works of Aristotle: The revised Oxford translation / ed. by Jonathan Barnes (1 ed. Vol. 2), Princeton University Press, Princeton (1984)
3. Brewster, S.A., Wright, P.C., Edwards, A.D.N.: Experimentally derived guidelines for the creation of earcons. In: Adjunct Proceedings of HCI 1995, Huddersfield, UK (1995)
4. Carroll, J.M., Mack, R.L.: Metaphor, computing systems, and active learning. International Journal of Man-Machine Studies 22(1), 39–57 (1985)
5. Cooper, D.E.: Metaphor. Billing & Sons, Worcester (1986)